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Applied Physics Letters / Volume 97 / Issue 5 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 97, 052503 (2010); http://dx.doi.org/10.1063/1.3476348 (3 pages)

Reversibility and irreversibility of magnetocaloric effect in a metamagnetic shape memory alloy under cyclic action of a magnetic field

V. V. Khovaylo1, K. P. Skokov2,3, O. Gutfleisch3, H. Miki4, R. Kainuma5, and T. Kanomata6

1National University of Science and Technology “MISiS”, Moscow 119049, Russia
2Faculty of Physics, Tver State University, Tver 170000, Russia
3Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), P.O. Box 270016, D-01171 Dresden, Germany
4Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan
5Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
6Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan

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(Received 24 May 2010; accepted 17 July 2010; published online 3 August 2010)

We have studied adiabatic temperature change ΔTad in a Ni50Mn36Co1Sn13 metamagnetic shape memory alloy. An irreversible character of ΔTad has been observed in the vicinity of the reverse martensitic transformation. In this region, cyclic application of the magnetic field converts comparatively large inverse magnetocaloric effect (MCE) with ΔTadmax = −0.8 K to a weaker conventional MCE (ΔTadmax = 0.3 K). The crossover of ΔTad has been attributed to the irreversible character of the magnetic field-induced transformation and the closeness of the martensitic transformation and Curie temperature of the austenitic phase TCA.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

cobalt alloys, Curie temperature, magnetocaloric effects, manganese alloys, metamagnetism, nickel alloys, shape memory effects, tin alloys

PACS

  • 75.30.Sg

    Magnetocaloric effect, magnetic cooling

  • 75.30.Kz

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

  • 81.40.Lm

    Deformation, plasticity, and creep

  • 64.70.K-

    Solid-solid transitions

  • 62.20.fg

    Shape-memory effect; yield stress; superelasticity

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3476348

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (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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