Spin‐Lattice Heat Transfer in Pulsed Magnetic Fields

Autor:	E. J. Verwey, G. de Vries, A. R. Miedema, L. W. Roeland
Rok vydání:	1968
Předmět:	Paramagnetism Magnetization Condensed matter physics Field (physics) Chemistry Relaxation (NMR) Spin–lattice relaxation General Physics and Astronomy Field dependence Condensed Matter::Strongly Correlated Electrons Direct process Magnetic field
Zdroj:	Journal of Applied Physics. 39:830-831
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.2163633
Popis:	Spin‐lattice relaxation in a paramagnetic salt at liquid‐helium temperatures has been studied by observing the time dependence of the magnetization in a pulsed magnetic field. The nearly trapezoidal field pulse can be kept constant during 0.3 sec for the largest field of 15 MA/m (200 kOe) and it is possible to determine relaxation times between 10−2 and about 10 sec.The spin‐lattice relaxation in CuCs2(SO4)2·6H2O is found to be governed by the direct process between 1.8° and 4.2°K, the field dependence of the relaxation time being H1.6. Below 1.8°K the relaxation rate suddenly becomes much slower, which is ascribed to an increase of the wavelength for phonon‐phonon interaction, such that phonon‐heating effects predominate below 1.5°K.
Databáze:	OpenAIRE
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