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  Faculty Profile  Faculty ProfileLast Modified Time: 03:03:42 PM Thu, 8 Jan 2009 
Dr. Chuanbing Rong
 Contact Information
Dr. Chuanbing Rong
Research Associate Professor-Physics
 
Contact address   502 Yates St, SH108, Arlington, TX 76019     Office LocationMail Box: 19059, Science Hall, Room No.: 202A 
Email  crong@uta.edu    Contact Number 817-272-7604    Fax No: 817-272-3637    Cell Phone 682-433-6055    Web Link Web Link   
 Professional Preparation
 DegreeMajorInstitutionYear
 Ph.DCondensed Matter PhysicsInstitute of Physics, Chinese Academy of Science2004
 M.SMaterial ScienceNortheastern University, Shengyang, China2001
 B.A.Material ScienceNortheastern University, Shengyang, China1998
 Research and Expertise
Warm Compaction
 
Web Link
Density of the bulk samples up to 95% theoretical value has been obtained by high-pressure warm compaction of chemically synthesized nanoparticles while the nanostructured morphology is retained. The density increases with the compaction pressure and temperature and is also affected by the phase transition of the FePt compound from the disordered fcc structure to the ordered fct structure. Energy products up to 16.3 MGOe of the isotropic bulk nanocomposite magnets have been achieved, which is significantly higher than the theoretical limit for fully dense single-phase FePt magnets
Magnetic nanoparticles
 
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Direct evidences for the size-dependent chemical ordering and magnetic ordering in L10 FePt nanoparticles have been obtained by measuring the monodisperse nanoparticles prepared by the salt-matrix annealing technique. Quantitative correlations between particle size and the structural and magnetic properties show that the long-range chemical ordering parameter S, Curie temperature and saturated magnetization drop significantly with decreasing particle size d.

Advanced Materials, 18, 2984 (2006);

Magnetic nanocomposite
 
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Atomic interdiffusion between FePt and Fe3O4 nanoparticles has been studied by means of structural and magnetic characterizations. The results show that the Fe3Pt phase was formed during the annealing only when the mass ratio x of Fe3O4/FePt is larger than 1/20. When x £ 1/20, only FePt single phase is formed.

Journal of Physics D: Applied Physics, 40, 712 (2007)

Extraordinary MagnetoResistance
 
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Designed a modified semiconductor-metal hybrid device with IVIVI configuration. In this device, applied magnetic field can lead to the current redistribution between the two output current leads. The change of the output currents reaches 62.4% under magnetic field 5 T.

Appl. Phys. Lett. 89, 052503 (2006)

J. Magn. Magn. Mater., 301,407, (2006)

High-temperature SmCo magnets
 
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Studied the temperature dependence of coercivity of RE(Co,Cu,Fe,Zr)z (RE=Gd,Sm) magnets, including compositional and annealing effects. Coercivity mechanism of the precipitation-hardened RE(Co,Fe,Cu,Zr)z high-temperature magnets was found to vary with temperature. It is found that the anomalous Hc(T) near Tc of the 1:5 phase is caused by the fast drop of intergranular exchange coupling. This mechanism can also explain the coercivity behavior that the anomalous Hc(T) tends to disappear with increasing z-value.

Appl. Phys. Lett., 88, 042504, (2006).; J. Phys. D: Appl. Phys. 39, 437, (2006). ; Appl. Phys. Lett., 86, 122506, 2005; Chinese Physics., 14, 2122, 2005.; J. Appl. Phys., 97, 33907, 2005.; J. Magn. Magn. Mater. , 279, 143, 2004; J. Phys. D: Appl. Phys. 37, 3285, 2004.

Micromagnetic Simulation
 
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The functions of intergrain exchange coupling and dipolar interaction on the magnetization behavior and magnetic properties of nanocomposite magnets have been studied by micromagnetic calculations using the finite-element method. (J. Magn. Magn. Mater., 302, 126, (2006).; J. Appl. Phys., 96, 3921, 2004; J. Magn. Magn. Mater. , 277, 221, 2004 .) 

The simulation is also applied to the high-temperature RE(Co,Cu,Fe,Zr)z magnets. (J. Appl. Phys., 100, 123913 (2006).; J. Appl. Phys., 95, 1351, 2004.)

Bulk Amorphous alloy
 
Web Link

The effect of element additions on the thermal stability of the Fe-based supercooled liquid has been studied.

Chinese Physics, 11, 77, 2002.; Acta Physica Sinica, 50, 2235, 2001

toggle toggle Publications
  Category    Type  Publications per page   1 2 3 4 5 6 7 8 9 10 Next>> 13>> 
  YearPublication  Type
2009
J. Kim, C. B. Rong, J. P. Liu and S. Sun
Dispersible Ferromagnetic FePt nanoparticles
Advanced Materials, 20, In Press
 
2009
C. B. Rong and J. P. Liu
Effect of thermal fluctuations on the recoil loops of SmCo5/Fe nanocomposite system
J. Appl. Phys., In Press (2009)
 
2009
V. Nandwana, G. S. Chaubey, K. Yano, C. B. Rong and J. P. Liu
Bimagnetic nanoparticles with enhanced exchange coupling and energy products
J. Appl. Phys., 105, 014303 (2009)
 
2009
M. Yue, Y. P. Wang, N. Poudyal, C. B. Rong, and J. P. Liu
Preparation of Nd-Fe-B nanoparticles by surfactant-assisted ball milling technique
J. Appl. Phys., In Press (2009).
 
2009
N. Poudyal, G.S. Chaubey, C. B. Rong and J. P. Liu
Shape control of FePt nanocrystals
J. Appl. Phys., In Press (2009)
 
 Presentations and Projects
Presenations since 2002    
  1. C. B. Rong, Y.Z. Liu, M.J. Kramer and J.P. Liu; Magnetic Properties and Thermal Stability of SmCo/Fe Nanocomposite Powders Produced by Ball Milling; 2008 MRS meeting, Dec. 1-5, 2008, Boston, Massachusetts,

  2. J. Kim, C. B. Rong, J. P. Liu and S. S. Sun; Dispersible Ferromagnetic FePt Nanoparticles; 2008 MRS meeting, Dec. 1-5, 2008, Boston, Massachusetts,

  3. G. S Chaubey, N. Poudyal, C. B. Rong and J. P. Liu; Synthesis and Morphology Control of the FeCo Nanoparticles; 2008 MRS meeting, Dec. 1-5, 2008, Boston, Massachusetts,

  4. C. B. Rong and J. P. Liu; Micromagnetic simulation of Henkel plots and recoil loops of the Nd2Fe14B/±-Fe exchange-coupled nanocomposite magnets; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  5. C. B. Rong, Y. Liu and J. P. Liu; Investigation of thermal fluctuation effect in exchange-coupled SmCo5/±-Fe nanocomposite magnets; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  6. G. S. Chaubey, N. Poudyal, Y. Liu, C. B. Rong and J. P. Liu; Large-Scale Synthesis of Hard Magnetic Sm-Co Nanocrystals and SmCo/Fe Nanocomposite Particles by a Facile Method; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  7. N. Poudya, G. S. Chaubey, C. B. Rong and J. P. Liu; Shape Control of FePt Nanocrystals; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  8. N. Poudyal, G. S. Chaubey, C. B. Rong and J. P. Liu; Synthesis of Monodisperse FeCo Nanoparticles by Reductive Salt-matrix Annealing; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  9. M.Yue, Y.Wang, N. Poudyal, C. B. Rong and J.P. Liu; Preparation, structural and magnetic properties of Nd-Fe-B based nano-particles; 53rd conference on Magnetism and magnetic materials, November10-14, 2008, Austin, Texas

  10. C. B. Rong, V. Nandwana, N. Poudyal, G. S Chaubey, and J. P. Liu; Magnetic hardening in isolated FePt nanoparticles; The 8th International Conference on Nanotechnology, August 18-21, 2008, Arlington, Texas.

  11. C. B. Rong, Narayan Poudyal, J. P. Liu; Anisotropy, coercivity and thermal activation in L10-FePt Nanoparticles; 2008 APS meeting, March 10-14, New Orleans, Louisiana.

  12. C. B. Rong, Y. Liu, J. P. Liu; Effect of thermal fluctuation on the recoil loops of exchange-coupled nanocomposite magnets; 2008 APS meeting, March 10-14, New Orleans, Louisiana.

  13. C. B. Rong and J. P. Liu; Micromagnetic Simulation of the Competition Between Exchange and Magnetostatic Interactions in Composite Magnets; 2007 MRS meeting, November25-30, 2007, Boston, Massachusetts,

  14. C. B. Rong, Y.P. Wang, V. Nandwana and J.P. Liu; Bulk SmCo5/±-Fe Nanocomposite Magnets Prepared by Warm Compaction of Mechanically Milled Powders; 2007 MRS meeting, November25-30, 2007, Boston, Massachusetts,

  15. R. Skomski, J. P. Liu, C. B. Rong and D. J. Sellmyer; Magnetization Reversal in Small FePt:Fe Particles; 2007 MRS meeting, November25-30, 2007, Boston, Massachusetts,

  16. K. Yano, V. Nandwana, N. Poudyal, C. B. Rong and J. P. Liu; Rapid Thermal Annealing of Monodisperse FePt Nanoparticles; 2007 MRS meeting, November 25-30, 2007, Boston, Massachusetts,

  17. C. Wehrenberg, C. Dai, K. Chasse, N. Thadhani, C. B. Rong and Y. Hou; Simultaneous Shock Compaction and Severe Plastic Deformation of Micron and Nano Sized Powders for Fabrication of Bulk Magnets; 2007 MRS meeting, November 25-30, 2007, Boston, Massachusetts,

  18. G. S. Chaubey, Y.P. Wang, C. B. Rong, N. Poudyal, V. Nandwana, K. E. Elkin and J. P. Liu; Silica Encapsulation and Magnetic Properties of Hard Magnetic Sm2Co17 Nanoparticles Obtained by Mechanical Ball-milling Process; 2007 MRS meeting, November 25-30, 2007, Boston, Massachusetts,

  19. C. Dai, C. Wehrenberg, N. Thadhani, C. B. Rong and Y. Hou; Shock Densification of Micron- and Nano-sized SmCo5 Powders; 2007 MRS meeting, November 25-30, 2007, Boston, Massachusetts,

  20. C. B. Rong, Narayan Poudyal, Girija S Chaubey, et al., V Nandwana, Y. Liu, Y. Wu, M. Kramer, M. Kozlov; High thermal stability of carbon-coated L10-FePt nanoparticles prepared by salt-matrix annealing; 52nd conference on Magnetism and magnetic materials, Nov 5-9, 2007, Tampa, Florida

  21. R. Skomski, J. P. Liu, C. B. Rong and D. J. Sellmyer; Hysteresis of U1trasmall FePt:Fe Particles; 52nd conference on Magnetism and magnetic materials, Nov 5-9, 2007, Tampa, Florida

  22. C. B. Rong, V. Nandawana, J.P. Liu; Bulk nanocomposite magnets with enhanced exchange coupling, 2007 APS meeting, March 5-9, Denver, Colorado.

  23. N. Poudyal, G. S. Chaubey, C. B. Rong, and J. P. Liu; FeCo Nanoparticles by Salt-Matrix Annealing; 2007 APS meeting, March 5-9, Denver, Colorado.

  24. C. B. Rong, Y. Li, J. P. Liu; Curie temperature of Annealed FePt nanoparticle systems; 10th joint MMM/InterMag Conference, Jan 7-11, 2007, Baltimore, Maryland

  25. C. B. Rong, V. Nandwana, N. Poudyal, J. P. Liu; Bulk FePt/Fe3Pt nanocomposite magnets prepared by spark plasma sintering; 10th joint MMM/InterMag Conference, Jan 7-11, 2007, Baltimore, Maryland

  26. C. B. Rong, V. Nandwana, N. Poudyal, Y. Li, J. P. Liu, M. E. Kozlov, A. Zakhidov and R. H.  Baughman; Inter-particle Magnetic Interactions in Nanoparticles Compacts; 2006 MRS meeting, Nov.27-Dec.1, 2006, Boston, Massachusetts,

  27. Y. Hou, Z. Xu, S. Sun, C. B. Rong and J. P. Liu; Chemical Synthesis and Characterization of SmCo5 and Fe/Co-Doped SmCo5 Hard Magnetic Nanocomposites; 2006 MRS meeting, Nov.27-Dec.1, 2006, Boston, Massachusetts,

  28. C. B. Rong, V. Nandwana, N. Poudyal, and J. P. Liu; High density FePt-based nanocomposite bulk magnets prepared by warm compaction; 2006 Texas Section of the APS Joint Fall Meeting, October 5–7, 2006, Arlington, Texas

  29. Y. P. Wang, Y. Li, C. B. Rong and J. P. Liu; Properties of SmCo nanoparticles prepared by surfactant-assisted ball milling; 2006 Texas Section of the APS Joint Fall Meeting, October 5–7, 2006, Arlington, Texas

  30. N. Poudyal, G. S. Chaubey, C. B. Rong, and J. P. Liu; Novel Approaches for the Synthesis of FeCo Nanoparticles; 2006 Texas Section of the APS Joint Fall Meeting, October 5–7, 2006, Arlington, Texas

  31. C. B. Rong, H. W. Zhang, J. R. Sun, and B. G. Shen; The finite-element simulation of extraordinary magnetoresistance of hybrid semiconductor-metal hybrid structures (In Chinese); The 8th National theoretical symposia, Taiyuan, China, July 2005.

  32. C. B. Rong, H. W. Zhang, R. J. Chen, S. L. He, J. R. Sun and B. G. Shen; The mechanism of abnormal temperature-dependent coercivity in Sm(Co,Cu,Fe,Zr)Z magnets (In Chinese); The 12th National magnetism and magnetic materials meeting, WuYiShan, China, November 16-21, 2005.

  33. S. L. He, H. W. Zhang, C. B. Rong, R. J. Chen, J. R. Sun and B. G. Shen; The study of grain alignment on the magnetic properties of permanent magnets with small grain size (In Chinese); The 12th National magnetism and magnetic materials meeting, WuYiShan, China, November 16-21, 2005.

  34. R. J. Chen, H. W. Zhang, C. B. Rong, J. R. Sun and B. G. Shen; Micromagnetic analysis on the angular dependent coercivity in Sm(Co,Cu,Fe,Zr)Zmagnets (In Chinese); The 12th National magnetism and magnetic materials meeting, WuYiShan, China, November 16-21, 2005.

  35. C. B. Rong, R. J. Chen, H. W. Zhang, J. Zhang, S. Y. Zhang, B. G. Shen; High temperature magnetic properties of precipitation-hardened Pr-Co based magnets; 2004 International conference on rare earth research and application, Baotou, China, August 8-12, 2004.

  36. H. W. Zhang, C. B. Rong, R. J. Chen, S. Y. Zhang and B. G. Shen; The effect of characteristic of a quasiplanar inhomogeneity on hard magnetic properties in a nanocrystalline permanent magnet; 2004 International Conference on Rare Earth Research and Application, Baotou, China, August 8-12, 2004.

  37. C. B. Rong, H. W. Zhang, J. Zhang, X. B. Du, S. Y. Zhang, B. G. Shen; Micromagnetic simulation of the magnetization reversal in Sm(Co,Fe,Cu,Zr)z magnets; 1st China-Japan joint symposium on new rare earth materials. Changchun, China, September 25, 2003.

  38. H.W. Zhang, C.B. Rong, X.B. Du, S.Y. Zhang, B.G. Shen; Hard magnetic properties of nanocomposite permanent magnets with precipitate-typed microstructure by micromagnetic finite element methods; 1st China-Japan joint symposium on new rare earth materials, Changchun, China, September 25,2003.

  39. X.B. Du, H.W. Zhang, C.B. Rong, J. Zhang, S.Y. Zhang, B.G. Shen, Y. Yan, H.M. Jin; Magnetic behaviors of nanocomposite Pr8Fe86B6 and nanocrystalline Pr12Fe82B6 melt-spun ribbons; 1st China-Japan joint symposium on new rare earth materials, Changchun, China, September 25, 2003,

  40. C. B. Rong, H. W. Zhang, R. J. Chen, S. L. He, S. Y. Zhang and B. G. Shen; Investigation of intergrain exchagne coupling interaction of nanocrystalline permanent magnets by numerical simulation, (In Chinese); The 4th National thin films and nanomagnetism meeting. Tianjin, May 2004

  41. H. W. Zhang, C. B. Rong, S. Y. Zhang, and B. G. Shen; Investigation of high-performance hard magnetic properties of nanocomposite permanent magnets by micromagnetic finite element method (In Chinese); The 4th National thin films and nanomagnetism meeting. Tianjin, May 2004

  42. R. J. Chen, C. B. Rong, H. W. Zhang, S. L. He, S. Y. Zhang and B. G. Shen; Micromagnetic analysis of the magnetization reversal processes in Sm(Co,Cu,Fe,Zr)z magnets. (In Chinese); The 4th National thin films and nanomagnetism meeting. Tianjin, May 2004

  43. G. J. Liu, X. B. Du, C. B. Rong, R. J. Chen, S. Y. Zhang, H. W. Zhang and B. G. Shen; The effect of Co content on the magnetic properties of melt-spun Pr10Fe74-xCo10+xC4B4 (x=0,2,4,6,8) ribbons (In Chinese); The 4th National thin films and nanomagnetism meeting. Tianjin, May 2004

  44. S. L. He, H. W. Zhang, C. B. Rong, R. J. Chen, S. Y. Zhang and B. G. Shen; The effect of microstructure on the magnetic properties of Pr2Fe14B nanocrystalline permanent magnets (In Chinese); The 4th National thin films and nanomagnetism meeting. Tianjin, May 2004

  45. C. B. Rong, H. W. Zhang, J. Zhang, S. Y. Zhang and B. G. Shen; The study of domain-wall pinning by inhomogeneities in nanocrystalline permanent magnets, (In Chinese); The 11th National magnetism and magnetic materials meeting, Changsa, November 2002.

  46. H. W. Zhang, C. B. Rong, J. Zhang, S. Y. Zhang, and B. G. Shen; Simulation of magnetization behavior in nanocrystalline Pr2Fe14B by micromagnetic finite element method (In Chinese); The 11th National magnetism and magnetic materials meeting, Changsa, November 2002.

  47. H. W. Zhang, C. B. Rong, J. Zhang, S. Y. Zhang, and B. G. Shen; Mechanism of magnetization reversal in nanocrystalline Pr8Fe87B5 (In Chinese); The 11th National magnetism and magnetic materials meeting, Changsa, November 2002.

  48. J. Zhang, H. Liu, C. B. Rong, S. Y. Zhang, and B. G. Shen (In Chinese); Phase structure and magnetic properties of Pr-Co-Cu-Ti high-temperature magnets; The 11th National magnetism and magnetic materials meeting, Changsa, November 2002.

 Appointments
DurationRankDepartment / SchoolCollege / OfficeUniversity / Company
Aug. 2005-Sep.2007Post-Doctoral AssociateDepartment of PhysicsCollege of ScienceUniversity of Texas at Arlington
Sep. 2007-PresentResearch Assistant ProfessorDepartment of PhysicsCollege of ScienceUniversity of Texas at Arlington
Jun. 2004-Aug.2005Post-Doctoral AssociateState Key Laboratory of MagnetismInstitute of PhysicsChinese Academy of Science
 Support
 DurationTitleSponsorAmountStatus
Jun. 2004-Jun.2006EMRChinapostdoctor Foundation10,000Previous
Jun. 2004-Jun. 2006High-temperature magnetsK.C.WONG Education Foundation, Hong Kong30,000Previous
 News Articles
Making hard nanoparticles the easy way -- Nov 22, 2007
nanotechweb.org

We achieved the SmCo nanoparticles using a simple ball milling technique where the particles were suspended in a surfactant. .  More in the news article publiched Nov 22, 2007 on http://nanotechweb.org/cws/article/tech/31943.

Magnets warm up to get stronger -- Aug 29, 2007
Nanotechweb.org

Dr. Rong and Co-authors developed a warm compaction technique to make small, powerful bulk permanent magnets out of iron-platinum nanoparticles .  More in the news article publiched Aug. 29, 2007 on http://nanotechweb.org/articles/news/6/8/25/1.

 Teaching
 
PHYS 4325 - Slod State Physics and Nanomaterials
2008
Classification of crystalline solids and elastic and thermal properties, electric and magnetic properties, and electronic properties of solids. An introduction to current research problems. Prerequisite: PHYS 4315 or permission of the instructor.
Contact Information
Science Hall, #202A
Phone: 817-272-7604  Email: crong@uta.edu
For the Official List of Courses for registration, please visit MyMav - Schedule of Classes
 
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