Control of Magnetic Properties of NiMn2O4 by a Microwave Magnetic Field under Air
AbstractNiMn2O4 prepared by conventional heating was irradiated with a microwave H-field using a single-mode cavity under air and magnetic properties of the microwave-irradiated material were investigated. X-ray diffraction and transmission electron microscopy demonstrated that the phase and microstructure are not affected by H-field irradiation. Measurements of the magnetization as a function of temperature revealed that the antiferromagnetic sublattice disappeared and electron spin resonance showed the existence of Mn2+, suggesting that Mn3+ is partially reduced. Moreover, the magnetization of NiMn2O4 was controlled from 35.3 to 18.2 emu/g and the coercivity from 140 to 750 Oe by changing the sample temperature during microwave irradiation. The reduction reaction of NiMn2O4 is controlled by microwave H-field irradiation, resulting in control over the magnetic properties. View Full-Text
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Goto, H.; Fukushima, J.; Takizawa, H. Control of Magnetic Properties of NiMn2O4 by a Microwave Magnetic Field under Air. Materials 2016, 9, 169.
Goto H, Fukushima J, Takizawa H. Control of Magnetic Properties of NiMn2O4 by a Microwave Magnetic Field under Air. Materials. 2016; 9(3):169.Chicago/Turabian Style
Goto, Hiroshi; Fukushima, Jun; Takizawa, Hirotsugu. 2016. "Control of Magnetic Properties of NiMn2O4 by a Microwave Magnetic Field under Air." Materials 9, no. 3: 169.
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