Evidence for easy axis rotation in Dy/sub 1-x/Gd/sub x/Al/sub 2/ alloys from nuclear hyperfine field measurements

Journal Article · Thu Mar 01 04:00:00 EST 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.326988· OSTI ID:6298872

Berthier, Y; Devine, R A.B.

We have studied the nuclear magnetic resonance of /sup 163/Dy in ferromagnetic Dy/sub 1-x/Gd/sub x/Al/sub 2/ alloys (0< or =x< or =0.99). The observed behaviour of the resonance frequencies of the various resonances observed is anomalous and does not follow simple molecular field arguments. Quadrupolar splitting measurements suggest that within a given Dy environment of 0, 1, 2, 3 or 4 Gd nearest neighbours the Dy moment is independent of concentration of Gd. These results lead us to believe that the easy axis of magnetization rotates gradually from (100) to (111) in these compounds and that we in fact sense the Dy moment through nuclei in the domain wall edge. From enhancement factor measurements we conclude that the Dy single ion anisotropy is very small and that the predominate term, establishing domain wall stiffness, is the Dy-Dy interaction anisotropy.

• Research Organization: Laboratoire de Spectrometrie Physique, B.P. 53 X, 38041 Grenoble-cedex, France
• OSTI ID: 6298872
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:B3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
ALLOYS
ALUMINIUM ALLOYS
ANISOTROPY
DOMAIN STRUCTURE
DYSPROSIUM ALLOYS
FERROMAGNETISM
GADOLINIUM ALLOYS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETISM
MAGNETIZATION
NUCLEAR MAGNETIC RESONANCE
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RESONANCE