A159Tb NMR study of the hexagonal and rhombohedral phases of Tb2Co17

Autor:	D St P Bunbury, Y Li, M A H McCausland, R G Graham
Rok vydání:	1993
Předmět:	Magnetization Crystallography Domain wall (magnetism) Condensed matter physics Chemistry Ferrimagnetism Phase (matter) Hexagonal phase General Materials Science Zero field splitting Condensed Matter Physics Anisotropy Hyperfine structure
Zdroj:	Journal of Physics: Condensed Matter. 5:6323-6334
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/5/34/018
Popis:	The zero-field hyperfine splitting of 159Tb in ferrimagnetic Tb2Co17 has been studied by NMR at 4.2 K. Distinct domain and wall spectra are obtained from the dominant rhombohedral phase; weaker spectra from the two inequivalent lanthanide sites in the hexagonal phase have also been observed. The data are interpreted in terms of the single-ion mean-field model. Estimates of the extra-ionic hyperfine fields and the electric-field gradients, and the antishielding ratios at the rhombohedral and hexagonal sites have been made using exchange and crystal-field parameters derived from magnetization and anisotropy measurements. Results are discussed in the light of complementary data obtained from other sources.
Databáze:	OpenAIRE
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