Spin wave stiffness constant of amorphous (Co1−xNix)75Si10B15 alloys

✍ Scribed by Kyeong-Sup Kim; Seong-Cho Yu; Woo-Young Lim; Yark-Yeon Kim; Soo-Hyung Lee; Won-Tae Kim

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 331 KB
• Volume: 181-182
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(94)90774-9

✦ Synopsis

We report here the spin wave stiffness constants of amorphous (Co I _ ~Ni~)75Sij0B15 (0.1 ~< x ~< 0.5, x increases in steps of 0.1) alloys obtained from the low temperature magnetization curves and spectroscopic splitting g factors. The low temperature dependence of the magnetization was measured with a superconducting quantum interference device magnetometer and the g values were derived from ferromagnetic resonance measurements. The g values increase with increasing Ni content. The temperature dependence of magnetization is in good agreement with Bloch's relation M~(T) = Ms(0)(1-B T 3/2 -CT5/2) at low temperatures, and the spin wave stiffness constants become smaller with the addition of Ni.