Hyperfine Field in YIG with Charged Substitution

• Authors: J. Kohout , H. Štĕpánková , J. Englich , P. Novák , M. Kučera , K. Nitsch
• Languages of publication: EN

Abstracts

EN

^{57}Fe NMR spectra were measured on thin films of yttrium iron garnet with divalent (Ca^{2+}) and tetravalent (Ge^{4+}) cation substitutions using the spin echo technique at 4.2 K. A series of Y_{3-x}Ca_{x}Fe_{5-x}Ge_{x}O_{12} samples with 0 ≤ x ≤ 0.0 5 was prepared by an epitaxial growth from BaO/B_{2}O_{3}/BaF_{2} flux on gadolinium gallium garnet substrate. Satellite lines corresponding to the iron ions having the Ge^{4+} and Ca^{2+} in their neighbourhood were identified. The sample with the germanium content of x(Ge) = 0.004 and (110) substrate orientation was used for a detailed study: NMR spectra of this sample were measured in an external magnetic field of 0.1 T applied along several directions in the plane of the film. The modification of the isotropic part and the anisotropy tensor of the hyperfine interaction caused by the Ge^{4+} substituent were obtained from the experimental data. The results were compared with those previously reported for trivalent substitution (Ga^{3+}).

Keywords

EN

76.60.-k; 75.50.Gg

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 75.50.Gg: Ferrimagnetics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 3
• Pages: 519-522

Dates

published

2000-03

Contributors

author

J. Kohout

• Faculty of Mathematics and Physics, Charles University 180 00 Prague 8, V Holešovičkách 2, Czech Republic

author

H. Štĕpánková

• Faculty of Mathematics and Physics, Charles University 180 00 Prague 8, V Holešovičkách 2, Czech Republic

author

J. Englich

• Faculty of Mathematics and Physics, Charles University 180 00 Prague 8, V Holešovičkách 2, Czech Republic

author

P. Novák

• Institute of Physics, Academy of Sciences Cukrovarnická 10, 16 253 Prague 6, Czech Republic

author

M. Kučera

• Faculty of Mathematics and Physics, Charles University 180 00 Prague 8, V Holešovičkách 2, Czech Republic

author

K. Nitsch

• Institute of Physics, Academy of Sciences Cukrovarnická 10, 16 253 Prague 6, Czech Republic

Identifiers

DOI

10.12693/APhysPolA.97.519