Paramagnetic tunneling state concept of the magnetic anomalies of amorphous insulators

Details Paramagnetic tunneling state concept of the magnetic anomalies of amorphous insulators Paramagnetic tunneling state concept of the magnetic anomalies of amorphous insulators

2005-09-05

arxiv.org/abs/cond-mat/0509116v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 2 figures

Scientific paper

A generalized tunneling model of insulating glasses is formulated, considering tunneling states to be paramagnetic centers of spin 1/2. The expression for magnetic field dependent contribution into the free energy is obtained. The derivation is made of the expression for the nonmonotonic magnetic field dependence of dielectric constant, recently observed in several glasses in the millikelvin temperature range.

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