Startling magnetic effects on the spontaneous polarization echo in some silicate glasses at low and ultralow temperatures have been reported in the last decade or so. Though some progress in search of an explanation has been made by considering the nuclear quadrupole dephasing of tunneling particles, here we show that the effect of a magnetic field can be understood quantitatively by means of a special tunnel mechanism associated with paramagnetic impurities. For the Fe3+-, Cr3+-, and Nd3+-contaminated glasses we provide reasonable fits to the published data as a function of applied magnetic field and temperature.

Paramagnetic Tunneling Systems and Their Contribution to the Polarization Echo in Glasses

JUG, GIANCARLO
2011-01-01

Abstract

Startling magnetic effects on the spontaneous polarization echo in some silicate glasses at low and ultralow temperatures have been reported in the last decade or so. Though some progress in search of an explanation has been made by considering the nuclear quadrupole dephasing of tunneling particles, here we show that the effect of a magnetic field can be understood quantitatively by means of a special tunnel mechanism associated with paramagnetic impurities. For the Fe3+-, Cr3+-, and Nd3+-contaminated glasses we provide reasonable fits to the published data as a function of applied magnetic field and temperature.
2011
low-temperature physics; tunneling systems in glasses; effect of the magnetic field
A., Borisenko; Jug, Giancarlo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1734400
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