Paramagnetic tunneling state concept of the low-temperature magnetic anomalies of multicomponent insulating glasses

Details Paramagnetic tunneling state concept of the low-temperature magnetic anomalies of multicomponent insulating glasses Paramagnetic tunneling state concept of the low-temperature magnetic anomalies of multicomponent insulating glasses

2006-03-17

arxiv.org/abs/cond-mat/0603465v1

Physica B 388 (2007) pp. 112--117

Physics

Condensed Matter

Soft Condensed Matter

submitted to Physica B

Scientific paper

10.1016/j.physb.2006.05.011

A generalized tunneling model of multicomponent insulating glasses is formulated, considering tunneling states to be paramagnetic centers of the electronic hole type. 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 susceptibility, recently observed in amorphous BaO-Al_2O_3-SiO_2 in sub-Kelvin temperature range.

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