Anomalous concentration dependence of the hyperfine field in ordered Dy/sub 1-x/Gd/sub x/Al/sub 2/ alloys

Journal Article · Thu May 01 04:00:00 EDT 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.21.3844· OSTI ID:5489526

Berthier, Y; Devine, R A.B.

We have studied the hyperfine field at the /sup 163/Dy nucleus across the whole range of Gd concentrations in ferromagnetic Dy/sub 1-x/Gd/sub x/Al/sub 2/ alloys by nuclear magnetic resonance. Contrary to expectation, the hyperfine field for each observed resonance is found to decrease with increasing Gd content or equivalent increasing molecular field. The reduction in hyperfine field appears to be correlated with a reduction expected in the transferred hyperfine field suggesting that fields due to 4f and self-polarization effects remain essentially constant. The results for hyperfine field and quadrupolar splitting at the /sup 163/Dy nucleus in Dy-rich and Gd alloys are also consistent and suggest the Dy 4f electron value remains constant across the series. Enhancement-factor measurements are consistent with Al nuclear-resonance and torque measurements and suggest the Dy anisotropy dominates in these compounds even for very small concentrations of Dy.

• Research Organization: Laboratoire de Spectrometrie Physique, B. P. 53X, 38041 Grenoble Cedex, France
• OSTI ID: 5489526
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 21:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ANISOTROPY
CRYSTAL FIELD
DYSPROSIUM 163
DYSPROSIUM ALLOYS
DYSPROSIUM ISOTOPES
EVEN-ODD NUCLEI
FERROMAGNETIC MATERIALS
GADOLINIUM ALLOYS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETIC MATERIALS
MAGNETIC RESONANCE
MATERIALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
QUANTITY RATIO
RARE EARTH ALLOYS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RESONANCE
STABLE ISOTOPES