Influence of magnetic impurities on the heat capacity of nuclear spins

Details Influence of magnetic impurities on the heat capacity of nuclear spins Influence of magnetic impurities on the heat capacity of nuclear spins

1997-09-03

arxiv.org/abs/cond-mat/9709043v2

Physics

Condensed Matter

Scientific paper

10.1134/1.567523

It is found that in 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 related to a nuclear-spin polarization by the magnetic impurities. The parameter that controls the theory turns out not to be the impurity concentration $C_{imp}$ but instead the quantity $c_{imp} \mu_e / \mu_n$, where $\mu_e$ and $\mu_n$ are the magnetic moments of an electron and a nucleus, respectively. The ratio of $\mu_e$ and $\mu_n$ is of order of $10^3$.

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