Determination of the magnetocaloric effect associated with martensitic transition in Ni46Cu4Mn38Sn12 and Ni50CoMn34In15 Heusler alloys

doi:10.1088/1674-1056/20/4/047502

中国物理B ›› 2011, Vol. 20 ›› Issue (4): 47502-047502.doi: 10.1088/1674-1056/20/4/047502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys

李哲, 敬超, 张浩雷, 曹世勋, 张金仓

Department of Physics, Shanghai University, Shanghai 200444, China

收稿日期:2010-07-31 修回日期:2010-11-06 出版日期:2011-04-15 发布日期:2011-04-15
基金资助:
Project supported by the Science Foundation of Surface Physics Laboratory (National Key Laboratory) of Fudan University (Grant No. FDS2008-B01), the Graduate Innovation Foundation of Shanghai University (Grant Nos. SHUCX101065 and SHUCX102011) and the National Natural Science Foundation of China (Grant Nos. 50932003 and 10804068).

Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys

Li Zhe(李哲),Jing Chao(敬超)^†,Zhang Hao-Lei(张浩雷), Cao Shi-Xun(曹世勋),and Zhang Jin-Cang(张金仓)

Department of Physics, Shanghai University, Shanghai 200444, China

Received:2010-07-31 Revised:2010-11-06 Online:2011-04-15 Published:2011-04-15
Supported by:
Project supported by the Science Foundation of Surface Physics Laboratory (National Key Laboratory) of Fudan University (Grant No. FDS2008-B01), the Graduate Innovation Foundation of Shanghai University (Grant Nos. SHUCX101065 and SHUCX102011) and the National Natural Science Foundation of China (Grant Nos. 50932003 and 10804068).

摘要/Abstract

摘要： This paper presents a study of the inverse magnetocaloric effect (MCE) corresponding to martensitic transition using various experimental approaches for Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloy. Through heat capacity measurements, it is found that the "giant inverse MCE" upon martensitic transition evaluated by the Maxwell relation in these alloys are unphysical results. This is due to the coexistence of both martensitic and austenitic phases, as well as thermal hysteresis during martensitic transition. However, careful study indicates that the spurious results during martensitic transition can be removed using a Clausius-Clapeyron equation based on magnetization measurements.

Abstract: This paper presents a study of the inverse magnetocaloric effect (MCE) corresponding to martensitic transition using various experimental approaches for Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloy. Through heat capacity measurements, it is found that the "giant inverse MCE" upon martensitic transition evaluated by the Maxwell relation in these alloys are unphysical results. This is due to the coexistence of both martensitic and austenitic phases, as well as thermal hysteresis during martensitic transition. However, careful study indicates that the spurious results during martensitic transition can be removed using a Clausius-Clapeyron equation based on magnetization measurements.

Key words: Heusler alloy, martensitic transition, magnetocaloric effect

中图分类号: (Other ferromagnetic metals and alloys)

75.50.Cc

81.30.Kf (Martensitic transformations) 75.30.Sg (Magnetocaloric effect, magnetic cooling)

李哲, 敬超, 张浩雷, 曹世勋, 张金仓. Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys[J]. 中国物理B, 2011, 20(4): 47502-047502.

Li Zhe(李哲),Jing Chao(敬超),Zhang Hao-Lei(张浩雷), Cao Shi-Xun(曹世勋),and Zhang Jin-Cang(张金仓) . Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys[J]. Chin. Phys. B, 2011, 20(4): 47502-047502.

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Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys

Determination of the magnetocaloric effect associated with martensitic transition in Ni₄₆Cu₄Mn₃₈Sn₁₂ and Ni₅₀CoMn₃₄In₁₅ Heusler alloys

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