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59 Co NMR and Nuclear Magnetic Relaxation Study of the Magnetic Superconductor Y 9 Co 7
Author(s) -
Figiel H.,
Barata A. C.,
Guimarães A. P.
Publication year - 1987
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221390130
Subject(s) - relaxation (psychology) , condensed matter physics , magnetization , superconductivity , line (geometry) , materials science , chemistry , nuclear magnetic resonance , magnetic field , physics , psychology , social psychology , geometry , mathematics , quantum mechanics
The magnetic superconductor Y 9 Co 7 presents in its structure magnetic and non‐magnetic Co atoms. A search is made of the 59 Co NMR lines attributed in the literature to magnetic Co atoms, with negative results. For the strong 59 Co NMR line arising from nuclei of non‐magnetic Co atoms the relaxation times T 1 and T 2 versus temperature are measured directly at 6.5 and 9.0 MHz. A linear dependence on temperature is observed for 1/ T 1 which can be attributed to interactions with conduction electrons. 1/ T 2 is not linear with temperature, an effect that is related to the temperature dependence of the magnetization.