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Magnetic Properties of Fe3-x MnxO4 Thin Films by FMR
Journal of Magnetics, Volume 2, Number 2, 30 Jun 1997, Pages 38-41
Ki-Hyeon Kim(Department of Physics, Myongji University), Young-Ho Kim(Department of Physics, Myongji University), Tae-Wook Ha(Dept. of Physics, Kyungsung University), Jeong-Sik Lee(Dept. of physics, Kyungsung University), Mann-Jang Park(Dept. of physics, Physics, Korea University)
Abstract
Spinel ferrite thin films Fe3-x MnxO4 (x=0.000, 0.006, 0.0010, 0.015, 0.023) were prepared on the coverglass by ferrite plating technique. To investigate the uniaxial anisotrpy of the samples, the saturation and effective magnetization of the thin films were measured by VSM(vibrating sample magnetometer) and FMR(ferromagnetic resonance) measurements respectively. The spectroscopic splitting g factor were estimated from the ferromagnetic resonance curves. For x=0.000, 0.006, the effective magnetization was measured of temperatures form T=77 K to T=300 K. The results were analyzed in terms of Bloch's law Ms(T) = Ms(0) (1-BT3/2-CT5/2). The Bloch coefficient B, C were determined by fitting. Ms(0) was obtained by extrapolating Meff to 0 K. From this result, the spin wave stiffness constants D was also determined.
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