Peculiarities of the magnetocaloric properties in Ni-Mn-Sn ferromagnetic shape memory alloys

被引：95

作者：

Khovaylo, V. V. ^{[1
,2
]}

Skokov, K. P. ^{[3
,4
]}

Gutfleisch, O. ^{[4
]}

Miki, H. ^{[5
]}

Takagi, T. ^{[5
]}

Kanomata, T. ^{[6
]}

Koledov, V. V. ^{[7
]}

Shavrov, V. G. ^{[7
]}

Wang, G. ^{[8
,9
]}

Palacios, E. ^{[8
,9
]}

Bartolome, J. ^{[8
,9
]}

Burriel, R. ^{[8
,9
]}

机构：

[1] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

[2] Moscow State Min Univ, Dept Phys, Moscow 119991, Russia

[3] Tver State Univ, Fac Phys, Tver 170000, Russia

[4] Leibniz Inst Solid State & Mat Res Dresden IFW Dr, Inst Metall Mat, D-01171 Dresden, Germany

[5] Tohoku Univ, Inst Fluid Sci, Sendai, Miyagi 9808577, Japan

[6] Tohoku Gakuin Univ, Fac Engn, Tagajo, Miyagi 9858537, Japan

[7] VA Kotelnikov Inst Radioengn & Elect, Moscow 125009, Russia

[8] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[9] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 21期

关键词：

TRANSFORMATION;

D O I：

10.1103/PhysRevB.81.214406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetocaloric properties of a Ni(50)Mn(36)Co(1)Sn(13) ferromagnetic shape memory alloy have been studied experimentally in the vicinity of a first-order magnetostructural phase-transition low-temperature paramagnetic martensite <-> high-temperature ferromagnetic austenite. The magnetic entropy change Delta S(m) calculated from the magnetization M(T) data measured upon cooling is higher than that estimated from M(T) measured upon heating. Contrary to Delta S(m), the adiabatic temperature change Delta T(ad) measured upon cooling is significantly smaller than that measured upon heating. The apparent discrepancy between Delta S(m) and Delta T(ad) (larger Delta S(m), smaller Delta T(ad) upon cooling, and smaller Delta S(m), larger Delta T(ad) upon heating) is caused by the hysteretical behavior of this magnetostructural transition, a feature common for all the alloys in the family of Ni(50)Mn(25+x)Z(25-x) (Z=In, Sn, Sb) ferromagnetic shape memory Heusler compounds. The hysteresis causes the magnetocaloric parameters to depend strongly on the temperature and field history of the experimental processes.

引用

页数：6

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