EPR studies of Cu²⁺ in K^1−xLi^xTaO³

C. B. Azzoni Dipartimento di Fisica, “A. Volta” and Istituto di Fisica della Materia Università di Pavia, via A. Basis 6, I-27100, Pavia, Italy

P. Camagni Dipartimento di Fisica, “A. Volta” and Istituto di Fisica della Materia Università di Pavia, via A. Basis 6, I-27100, Pavia, Italy

P. Galinetto Dipartimento di Fisica, “A. Volta” and Istituto di Fisica della Materia Università di Pavia, via A. Basis 6, I-27100, Pavia, Italy

M. C. Mozzati Dipartimento di Fisica, “A. Volta” and Istituto di Fisica della Materia Università di Pavia, via A. Basis 6, I-27100, Pavia, Italy

D. V. Azamat A. F. Ioffe Physico-Technical Institute, 194021, St. Petersburg, Russia

A. G. Badalyan A. F. Ioffe Physico-Technical Institute, 194021, St. Petersburg, Russia

V. A. Trepakov A. F. Ioffe Physico-Technical Institute, 194021, St. Petersburg, Russia

L. Jastrabik Institute of Physics, AS CR, Na Slovance 2, 182 21, Prague 8, Czech Republic

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Abstract

Electron paramagnetic resonance (EPR) of copper centers in KTaO₃:Li:Cu single crystals have been studied. Superhyperfine (SHF) structure of an exchange pair Cu²⁺-Cu²⁺ center, associated with the eight surrounding nearest-neighbor potassium ions was found. The EPR signal behaviour with the temperature may characterize the dielectric properties of crystals at the microwave frequency.

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EPR studies of Cu²⁺ in K^1−xLi^xTaO³

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EPR studies of Cu²⁺ in K^1−xLi^xTaO³