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Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window
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10.1063/1.4798318
/content/aip/journal/apl/102/12/10.1063/1.4798318
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/12/10.1063/1.4798318

Figures

Image of FIG. 1.
FIG. 1.

(a) Structural and magnetic phase diagram of the MnNiGe-MnCoGe system described in Ref. 29 . Reprinted with permission from Nizioł et al., J.Magn. Magn. Mater. 27, 281 (1982). Copyright 1982 Elsevier. (b) Schematic phase diagram of the MnNiGe-CoNiGe system.

Image of FIG. 2.
FIG. 2.

Room-temperature XRD patterns of Mn1− x Co x NiGe. Inset shows the composition-dependent lattice parameters (a, c axes) of austenite phase.

Image of FIG. 3.
FIG. 3.

M(T) curves of Mn1− x Co x NiGe in low (a) and high (b) magnetic fields.

Image of FIG. 4.
FIG. 4.

Isothermal M(H) curves of Mn1− x Co x NiGe martensite phases at 5 K. The insets illustrate the spiral AFM coupling of Mn-Mn pair and the FM coupling of Co-Mn pair.

Image of FIG. 5.
FIG. 5.

Magnetostructural phase diagram of Mn1− x Co x NiGe. The blue region shows the temperature gap between T t and T N M. The gradually increasing intensity of the red color demonstrates the AFM-FM conversion of martensites as a function of Co content.

Image of FIG. 6.
FIG. 6.

Magnetoresponsive effects of Mn0.9Co0.1NiGe. (a) The magnetic-field-induced MT at various temperatures. (b) Isothermal magnetic-entropy changes in various field changes. The insets are schematics of the crystalline and magnetic structures of austenite and martensite.

Tables

Generic image for table
Table I.

Phase structures, lattice parameters, martensitic-transition temperatures and magnetic properties of Mn1− x Co x NiGe at room temperature.

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/content/aip/journal/apl/102/12/10.1063/1.4798318
2013-03-28
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Giant magnetocaloric effect in isostructural MnNiGe-CoNiGe system by establishing a Curie-temperature window
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/12/10.1063/1.4798318
10.1063/1.4798318
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