Nuclear magnetic relaxation in scandium metal

S. Abe   ; A. V. Egorov   ; M. Hondoh   ; A. V. Klochkov   ; I. R. Mukhamedshin   ; V. V. Naletov   ; H. Suzuki   ; M. S. Tagirov   ; D. A. Tayurskii

Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Kazanskii Gosudarstvennyi Universitet. Uchenye Zapiski. Seriya Fiziko-Matematichaskie Nauki, Tome 147 (2005) no. 2, pp. 52-67

Résumé

The nuclear magnetic relaxation in scandium metal is investigated at liquid helium temperature for both single crystal and powder samples. The obtained temperature and field dependencies of the Korringa constant can be described by means of the spin fluctuation theory for $3d$ electrons. It is shown that the most probable reason for the decreasing relaxation rate at high magnetic field is the quenching of spin fluctuations. Another possible reason — the influence of magnetic impurities — is also analyzed. We discuss the reasons for the experimentally observed variations of the Korringa constant. The possible sources of non-single-exponential relaxation in scandium metal are investigated.

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