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(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.
Room-temperature XRD patterns of Mn1− x Co x NiGe. Inset shows the composition-dependent lattice parameters (a, c axes) of austenite phase.
M(T) curves of Mn1− x Co x NiGe in low (a) and high (b) magnetic fields.
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.
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.
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.
Phase structures, lattice parameters, martensitic-transition temperatures and magnetic properties of Mn1− x Co x NiGe at room temperature.
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