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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, 07A911 (2012); http://dx.doi.org/10.1063/1.3671422 (3 pages)

Magnetovolume effect in Ho2Fe17-xMnx compounds

J. L. Wang1,2,3, A. J. Studer2, S. J. Kennedy2, R. Zeng1, S. X. Dou1, and S. J. Campbell3

1Institute for Superconductivity and Electronic Materials, University of Wollongong, Australia
2Bragg Institute, ANSTO, Menai, NSW 2234, Australia
3School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600, Australia

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(Received 26 September 2011; accepted 18 October 2011; published online 13 February 2012)

The structural and magnetic properties of seven compounds in the Ho2Fe17-xMnx series (x = 0-5) have been investigated. The spontaneous magnetization Ms at 10 K exhibits a minimum at x ≈ 3.8 while the 3d-sublattice magnetization MT is found to decrease at ∼ −3.4 μB/per Mn atom compared with the rate of ∼−2.0 μB/per Mn atom expected from a simple dilution model. All of the Ho2Fe17-xMnx compounds exhibit anisotropic thermal expansion below their Curie temperatures leading to the presence of strong magnetovolume effects and Invar-type behavior below TC. An approximately zero volume thermal expansion has been detected between 10 K and 270 K for Ho2Fe17. The maximum magnetic entropy changes for Ho2Fe17-xMnx with x = 0 and 2.0 are 3.2 J kg−1 K−1 around TC ∼ 336 K and 2.7 J kg−1 K−1 around TC ∼ 302 K, respectively, for magnetic field change of B = 0-5 T.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL PROCEDURES
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

KEYWORDS, PACS, and IPC

Keywords

Curie temperature, entropy, holmium alloys, iron alloys, magnetisation, magnetocaloric effects, magnetomechanical effects, manganese alloys, thermal expansion

PACS

  • 81.05.Bx

    Metals, semimetals, and alloys

  • 65.40.De

    Thermal expansion; thermomechanical effects

  • 75.30.Kz

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

  • 75.30.Sg

    Magnetocaloric effect, magnetic cooling

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.80.+q

    Magnetomechanical effects, magnetostriction

International Patent Classification (IPC)

  • C22C38/00

    Ferrous alloys, e.g. steel alloys

  • C22C22/00

    Alloys based on manganese

  • H01F13/00

    Apparatus or processes for magnetising or demagnetising

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3671422

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.
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    P. C. Ezekwenna et al., J. Appl. Phys. 81, 4533 (1997)JAPIAU000081000008004533000001.

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    Y. G. Wang et al., J. Appl. Phys. 84, 6229 (1998)JAPIAU000084000011006229000001.

    J. L. Wang et al., J. Appl. Phys. 92, 1453 (2002)JAPIAU000092000003001453000001.

    J. Kamarád et al., J. Appl. Phys. 85, 4874 (1999)JAPIAU000085000008004874000001.

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