Magnetic hyperfine structure in amorphous DyFe$sub 2$
Results are summarized of a Moessbauer study of the amorphous rare earth- -transition metal alloy DyFe$sub 2$ in the magnetically ordered state. Both the $sup 57$Fe and $sup 161$Dy spectra were investigated as a function of temperature and reveal a broad, though measurable, distribution of Fe hyperfine fields (H/sub eff/) and quadrupole splittings (QS). There is a distribution similar in magnitude for the Dy hyperfine fields but the observed quadrupole splittings are narrowly distributed. The temperature variation of the $sup 161$Dy spectra indicates a large variation of local exchange splittings at the Dy sites. These results are discussed in terms of a model in which the Dy spins are more strongly coupled to their random-direction anisotropy axes than to the neighboring Fe spins (which also experience a weaker random-direction anisotropy.) (auth)
- Research Organization:
- Naval Research Lab., Washington, DC
- NSA Number:
- NSA-33-003567
- OSTI ID:
- 4151541
- Journal Information:
- AIP (Am. Inst. Phys.) Conf. Proc., no. 24, pp. 115-116, Conference: 20. annual conference on magnetism and magnetic materials, San Francisco, California, USA, 3 Dec 1974; Other Information: See CONF-741202--. Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Ceramics
& Other Materials-Metals & Alloys-Properties
Structure & Phase Studies
360104* -Materials-Metals & Alloys-Physical Properties
*DYSPROSIUM 161- MOESSBAUER EFFECT
*DYSPROSIUM ALLOYS- MAGNETIC PROPERTIES
*IRON 57- MOESSBAUER EFFECT
*IRON ALLOYS- MAGNETIC PROPERTIES
AMORPHOUS STATE
HYPERFINE STRUCTURE
INTERMETALLIC COMPOUNDS
TEMPERATURE DEPENDENCE