Influence of magnetic impurities on the heat capacity of nuclear spins |
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Authors: | A M Dyugaev Yu N Ovchinnikov P Fulde |
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Institution: | (1) Max-Planck-Institute for Physics of Complex Systems, D-01187 Dresden, Germany;(2) L. D. Landau Institute of Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia |
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Abstract: | It is found that over a wide range of temperatures and magnetic fields even a small concentration of magnetic impurities in
a sample leads to a T
−1 temperature dependence of the nuclear heat capacity. This effect is due to nuclear spin polarization by the magnetic impurities.
The parameter that controls the theory turns out not to be the impurity concentration n
imp but instead the quantity n
imp
μ
e
/μ
n
, where μ
e
and μ
n
are the magnetic moments of an electron and a nucleus, respectively. The ratio of μ
e
and μ
n
is of order of 103.
Pis’ma Zh. éksp. Teor. Fiz. 66, No. 5, 341–345 (10 September 1997)
Published in English in the original Russian journal. Edited by Steve Torstveit. |
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Keywords: | |
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