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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Magneto-Optic, Magnetoelastic, and Magnetocaloric Materials

J. Appl. Phys. 111, 07A909 (2012); http://dx.doi.org/10.1063/1.3670608 (3 pages)

Reduction of hysteresis loss and large magnetocaloric effect in the C- and H-doped La(Fe, Si)13 compounds around room temperature

H. Zhang1, B. G. Shen1, Z. Y. Xu1, X. Q. Zheng1, J. Shen2, F. X. Hu1, J. R. Sun1, and Y. Long3

1State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People’ Republic of China
2Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China
3School of Materials Science and Engineering, University of Science and Technology of Beijing, 100083, People’s Republic of China

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(Received 20 September 2011; accepted 13 October 2011; published online 9 February 2012)

The effects of the interstitial C and H atoms on the phase formation, the hysteresis loss, and magnetocaloric effects of the NaZn13-type La(Fe, Si)13 compounds are investigated. It is found that the annealing time to obtain a 1:13 structure is significantly reduced from 40 days for LaFe11.7Si1.3 to a week for LaFe11.7Si1.3C0.2. The introduction of C and H atoms can adjust Curie temperature to around room temperature and leads to the decrease in magnetic entropy change (ΔSM) and magnetic hysteresis loss due to the weakening of itinerant-electron metamagnetic transition. Large −ΔSM of 19.0 J/kg K at room temperature without hysteresis loss for LaFe11.7Si1.3C0.2H1.7 is obtained for a field change of 5 T.

© 2012 American Institute of Physics

KEYWORDS, PACS, and IPC

Keywords

annealing, Curie temperature, interstitials, iron compounds, lanthanum compounds, magnetic hysteresis, magnetic leakage, magnetic transitions, magnetocaloric effects, silicon compounds

PACS

  • 75.30.Sg

    Magnetocaloric effect, magnetic cooling

  • 61.72.jj

    Interstitials

  • 81.40.Gh

    Other heat and thermomechanical treatments

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

International Patent Classification (IPC)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670608

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    J. Shen, F. Wang, J. L. Zhao, J. F. Wu, M. Q. Gong, F. X. Hu, Y. X. Li, J. R. Sun, and B. G. Shen, J. Appl. Phys. 107, 09A909 (2010)JAPIAU00010700000909A909000001.

    J. Lyubina, K. Nenkov, L. Schultz, and O. Gutfleisch, Phys. Rev. Lett. 101, 177203 (2008).

    F. X. Hu, B. G. Shen, J. R. Sun, G. J. Wang, and Z. H. Cheng, Appl. Phys. Lett. 80, 826 (2002)APPLAB000080000005000826000001.

    A. Fujita, S. Fujieda, Y. Hasegawa, and K. Fukamichi, Phys. Rev. B 67, 104416 (2003).

    Y. F. Chen, F. Wang, B. G. Shen, J. R. Sun, G. J. Wang, F. X. Hu, Z. H. Cheng, and T. Zhu, J. Appl. Phys. 93, 6981 (2003)JAPIAU000093000010006981000001.

    M. Balli, D. Fruchart, and D. Gignoux, Appl. Phys. Lett. 92, 232505 (2008)APPLAB000092000023232505000001.

    J. Shen, B. Gao, H. W. Zhang, F. X. Hu, Y. X. Li, J. R. Sun, and B. G. Shen, Appl. Phys. Lett. 91, 142504 (2007)APPLAB000091000014142504000001.

    G. J. Liu, J. R. Sun, J. Shen, B. Gao, H. W. Zhang, F. X. Hu, and B. G. Shen, Appl. Phys. Lett. 90, 032507 (2007)APPLAB000090000003032507000001.

    W. B. Cui, W. Liu, and Z. D. Zhang, Appl. Phys. Lett. 96, 222509 (2010)APPLAB000096000022222509000001.


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