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Spin excitations in amorphous transition‐metal boron glasses

 

作者: J. J. Rhyne,   J. W. Lynn,   F. E. Luborsky,   J. L. Walter,  

 

期刊: Journal of Applied Physics  (AIP Available online 1979)
卷期: Volume 50, issue B3  

页码: 1583-1585

 

ISSN:0021-8979

 

年代: 1979

 

DOI:10.1063/1.327248

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Magnetic inelastic neutron scattering studies have been performed on ribbon specimens of amorphous Fe83B16.5Si0.5and Fe20Ni60B19P1. The samples were prepared from isotopically enriched B to reduce the neutron absorption. The Curie temperatures for the two materials are 613 K and 410 K respectively, and the room temperature saturation magnetizations 4&pgr;Msare 16.0 kG and 5.1 kG. In the Fe20Ni60B19P1specimen, well‐defined spin waves were observed at room temperature for neutron wave‐vector transfers in the range q=0.06 A˚−1to q=0.20 A˚−1. After correcting for instrumental resolution, the data obeyed a quadratic dispersion law with spin stiffness D=80 meV‐A˚2. Spin waves in the Fe83B16.5Si0.5amorphous alloy exhibited a D=125 meV‐A˚2consistent with the higher Tcof this alloy.

 

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