NDLI: On the Paramagnetic Impurity Concentration of Silicate Glasses from Low-Temperature Physics

Content Provider	Springer Nature Link
Author	Bonfanti, Silvia Jug, Giancarlo
Copyright Year	2015
Abstract	The concentration of paramagnetic trace impurities in glasses can be determined via precise SQUID measurements of the sample’s magnetization in a magnetic field. However, the existence of quasi-ordered structural inhomogeneities in the disordered solid causes correlated tunneling currents that can contribute to the magnetization, surprisingly, also at the higher temperatures. We show that taking into account such tunneling systems gives rise to a good agreement between the concentrations extracted from SQUID magnetization and those extracted from low-temperature heat capacity measurements. Without suitable inclusion of such magnetization contribution from the tunneling currents, we find that the concentration of paramagnetic impurities gets considerably over-estimated. This analysis represents a further positive test for the structural inhomogeneity theory of the magnetic effects in the cold glasses.
Starting Page	214
Ending Page	237
Page Count	24
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	180
Issue Number	3-4
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2015-05-19
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Low-temperature thermometry Magnetization of non-magnetic glasses Magnetic effects in insulating glasses Low- temperature properties of glasses Condensed Matter Physics Characterization and Evaluation of Materials Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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