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- W1541391794 abstract "The microstructures and magnetic properties of nanoparticles, each composed of an antiferromagnetic (AFM) manganese-oxide shell and a ferromagnetic-like core of manganese—gallium (MnGa) compounds, are studied. The core-shell structure is confirmed by transmission electron microscope (TEM). The ferromagnetic-like core contains three kinds of MnGa binary compounds, i.e., ferrimagnetic (FI) D022-type Mn3Ga, ferromagnetic (FM) Mn8Ga5, and AFM D019-type Mn3Ga, of which the first two correspond respectively to a hard magnetic phase and to a soft one. Decoupling effect between these two phases is found at low temperature, which weakens gradually with increasing temperature and disappears above 200 K. The exchange bias (EB) effect is observed simultaneously, which is caused by the exchange coupling between the AFM shell and FM-like core. A large coercivity of 6.96 kOe (1 Oe = 79.5775 A·m−1) and a maximum EB value of 0.45 kOe are achieved at 300 K and 200 K respectively." @default.
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- W1541391794 date "2014-07-31" @default.
- W1541391794 modified "2023-10-18" @default.
- W1541391794 title "Large coercivity and unconventional exchange coupling in manganese-oxide-coated manganese—gallium nanoparticles" @default.
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- W1541391794 doi "https://doi.org/10.1088/1674-1056/23/8/087503" @default.
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