<math>59Co </math> NMR and Nuclear Magnetic Relaxation Study of the Magnetic Superconductor <math>Y9Co7</math>

Physics NotePublished

$<math>^{59}Co </math>$ NMR and Nuclear Magnetic Relaxation Study of the Magnetic Superconductor $<math>Y_9Co_7</math>$

H. Figiel; A.C. Barata; A. P. Guimarães

1986

Authors: H. Figiel; A.C. Barata; A. P. Guimarães
Type: Physics Note
Status: Published
Publication date: 1986
Description: The magnetic superconductor <math>Y_9Co_7\,\!</math> presents in its structure magnetic and non magnetic Co atoms. A search was made of the <math>^{59}Co \,\!</math> NMR lines attributed in the literature to magnetic Co atoms, with negative results. For the strong <math>^{59}Co \,\!</math> NMR line arising from nuclei of non-magnetic Co atoms the relaxation times <math>T_1\,\!</math> and <math>T_2\,\!</math> versus temperature were measured directly at 6.5 MHz and 9.0 MHz. A linear dependence on temperature was observed for <math>1/T_1\,\!</math> which can be attributed to interactions with conduction electrons. <math>1/T_2\,\!</math> is not linear with temperature, an effect that is related to the temperature dependence of the magnetization.
Year: 1986
Number: CBPF-NF-051/86
Linked to a thesis: No
Linked to a grant: No