Title :
Spin wave stiffness constant on the amorphous and nanocrystalline state of Fe76Cu1Nb3Si14B6 alloys
Author :
Yu, Seong-Cho ; Henryk Kepa ; Kim, Won-Tae ; Zeiske, Thomas ; Weiss, Lothar
Author_Institution :
Dept. of Phys., Chung-Buk Nat. Univ., Cheongju, South Korea
fDate :
11/1/1995 12:00:00 AM
Abstract :
We report here on the effect of annealing temperatures on the spin wave excitations for the amorphous and nanocrystalline state of Fe76Cu1Nb3Si14B6 alloys, observed from the low temperature magnetization curves and the spectroscopic splitting g factors. The temperature dependence of saturation magnetization was measured with a vibrating sample magnetometer and the SQUID magnetometer. Spectroscopic splitting g-values were estimated from ferromagnetic resonance experiments (FMR). The thermo-magnetization curve is found to obey Bloch´s law, Ms (T)=Ms(0)(1-BT3/2-CT5/2). The spin wave stiffness constants were also observed from the preliminary results of the neutron inelastic scattering measurements. The spin wave stiffness constants obtained from two different experimental methods on the Fe76Cu1Nb3Si14B6 alloys agree fairly well
Keywords :
amorphous magnetic materials; annealing; boron alloys; copper alloys; ferromagnetic resonance; g-factor; iron alloys; magnetisation; nanostructured materials; neutron diffraction; niobium alloys; silicon alloys; soft magnetic materials; spin waves; Bloch´s law; Fe76Cu1Nb3Si14B6; SQUID magnetometer; amorphous state; annealing temperature; ferromagnetic resonance; low temperature magnetization curves; nanocrystalline state; neutron inelastic scattering; saturation magnetization; spectroscopic splitting g factors; spin wave stiffness constant; thermo-magnetization curve; vibrating sample magnetometer; Amorphous materials; Annealing; Copper alloys; Iron alloys; Magnetic resonance; Niobium alloys; SQUID magnetometers; Silicon alloys; Spectroscopy; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
