Tuning structural instability toward enhanced magnetocaloric effect around room temperature in MnCo(1-x)Zn(x)Ge.
Tuning structural instability toward enhanced magnetocaloric effect around room temperature in MnCo(1-x)Zn(x)Ge.
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DOI:
10.1038/srep07544
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发表时间:
2014-12-18
影响因子:
4.6
通讯作者:
Taguchi Y
中科院分区:
文献类型:
--
作者:
Choudhury D;Suzuki T;Tokura Y;Taguchi Y
Magnetocaloric effect is the phenomenon that temperature change of a magnetic material is induced by application of a magnetic field. This effect can be applied to environmentally-benign magnetic refrigeration technology. Here we show a key role of magnetic-field-induced structural instability in enhancing the magnetocaloric effect for MnCo1−xZnxGe alloys (x = 0–0.05). The increase in x rapidly reduces the martensitic transition temperature while keeping the ferromagnetic transition around room temperature. Fine tuning of x around x = 0.03 leads to the concomitant structural and ferromagnetic transition in a cooling process, giving rise to enhanced magnetocaloric effect as well as magnetic-field-induced structural transition. Analyses of the structural phase diagrams in the T-H plane in terms of Landau free-energy phenomenology accounts for the characteristic x-dependence of the observed magnetocaloric effect, pointing to the importance of the magnetostructural coupling for the design of high-performance magnetocalorics.
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影响因子:
4
作者:
Wada, H;Tanabe, Y
通讯作者:
Tanabe, Y
影响因子:
64.8
作者:
Kainuma, R;Imano, Y;Ishida, K
通讯作者:
Ishida, K
DOI:
10.1088/0022-3719/8/5/005
发表时间:
1975-01-01
期刊:
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS
影响因子:
--
作者:
IMRY, Y
通讯作者:
IMRY, Y
影响因子:
3.2
作者:
Samanta, Tapas;Dubenko, Igor;Ali, Naushad
通讯作者:
Ali, Naushad
影响因子:
8.6
作者:
Pecharsky, VK;Gschneidner, KA
通讯作者:
Gschneidner, KA