Anisotropic hyperfine interaction for /sup 119/Sn impurity atoms in the ferrimagnet TmFe/sub 2/

Journal Article · Sat Nov 30 23:00:00 EST 1985 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5661071

Delyagin, N N; Mudzhiri, G T; Nesterov, V I; Churakov, A K

A Moessbauer spectroscopy study is made of the magnetic hyperfine interaction (MHI) for /sup 119/Sn atoms substituted for Fe atoms in the ferrimagnetic intermetallic compound TmFe/sub 2/. At 77 K the local magnetic fields for the Sn atoms in the a-italic and b-italic sites of the Fe sublattice are 8.32 +- 0.03 and 5.50 +- 0.02 T, respectively. The magnetic hyperfine fields (found after correcting for the dipole field) are B-italic/sub hf/(a-italic) = 9.72 T and B-italic/sub hf/(b-italic) = 4.99 T. The isotropic and anisotropic components of B-italic/sub hf/ are 6.17 T and 3.55 T, respectively. The magnetic hyperfine field is antiparallel to the magnetization of the Fe sublattice. Analysis of the temperature dependence of B-italic/sub hf/ and the structure of the Moessbauer spectra of /sup 119/Sn in the alloys (Tm,Y)Fe/sub 2/, (Tm,Gd)Fe/sub 2/, and Tm(Fe,Al)/sub 2/ implies that the MHI for Sn impurity atoms in TmFe/sub 2/ is determined entirely by the Fe sublattice. The parameters found for the MHI and the giant anisotropy of B-italic/sub hf/ are interpreted with the aid of a two-component model of the MHI./sup 4/ The lack of a contribution to B-italic/sub hf/ from the Tm sublattice is treated as a consequence of the correlation between the MHI parameters and the peculiar features of the chemical bond of the Sn impurity atom with neighboring magnetic atoms.

• Research Organization: Institute of Nuclear Physics of the M. V. Lomonosov State University, Moscow
• OSTI ID: 5661071
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 62:6; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
CHEMICAL BONDS
DAYS LIVING RADIOISOTOPES
EVEN-ODD NUCLEI
FERRIMAGNETIC MATERIALS
HYPERFINE STRUCTURE
IMPURITIES
INTERMEDIATE MASS NUCLEI
INTERMETALLIC COMPOUNDS
INTERNAL CONVERSION RADIOISOTOPES
IRON ALLOYS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LOW TEMPERATURE
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MOESSBAUER EFFECT
NUCLEI
PHYSICAL PROPERTIES
RADIOISOTOPES
RARE EARTH ALLOYS
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THULIUM ALLOYS
TIN 119
TIN ISOTOPES