Title

Magneto-Induced Microwave Conductivity In Mn2+-Doped Silicate Glass

Abstract

A non-resonant microwave absorption induced by low magnetic field (magneto-induced microwave conductivity) was observed in Na2O-CaO-MgO-SiO2 glasses doped with Mn in addition to the usual EPR signal of Mn2+. The non-resonant response increases with the increase of Mn2+ concentration in glasses. In contrast to the EPR signal, the magnitude of non-resonant absorption does not show saturation at high microwave power and grows much faster as the temperature decreases. The magneto-induced microwave conductivity in the glass dielectric is explained by the magnetic field-dependent electron tunneling between non-bridging oxygen ions adjacent to paramagnetic Mn2+ ions. The high probability of tunneling is provided by aligning the electron spins in Mn2+ and adjacent non-bridging oxygen ions in the external magnetic field.

Publication Date

3-2-2000

Publication Title

Journal of Non-Crystalline Solids

Volume

265

Issue

1

Number of Pages

181-184

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/S0022-3093(99)00961-8

Socpus ID

0033878854 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0033878854

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