T. P. Gavrilova, R. M. Eremina, I. V. Yatsyk, I. I. Fazlizhanov, A. A. Rodionov, D. V. Mamedov, N. V. Andreev, V. I. Chichkov, Ya. M. Mukovskii, “EPR spectra of a GdMnO3 thin film on a SrTiO<nobr>$_3$</nobr> substrate”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2013, Volume 98, Issue 7,Pages <nobr>434

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CONDENSED MATTER

EPR spectra of a GdMnO3 thin film on a SrTiO$_3$ substrate

T. P. Gavrilova^a, R. M. Eremina^a, I. V. Yatsyk^a, I. I. Fazlizhanov^a, A. A. Rodionov^b, D. V. Mamedov^b, N. V. Andreev^c, V. I. Chichkov^c, Ya. M. Mukovskii^c

^a Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences
^b Kazan (Volga Region) Federal University
^c National University of Science and Technology «MISIS»

Abstract: Electron paramagnetic resonance (EPR) spectra of a GdMnO3/SrTiO$_3$ thin film in the $X$ band have been measured in the temperature interval from $200$ to $450$ K. Signals from two types of paramagnetic centers have been observed in the spectra. The first paramagnetic center is a subsystem of Gd$^{3+}$ ions, in the EPR spectrum of which the fine structure lines are resolved below $350$ K. The second paramagnetic center is a system of manganese and gadolinium ions, in the EPR spectrum of which an exchange-narrowed line is observed with the width $\Delta H$ several times less than the width $\Delta H$ of an exchange-narrowed line observed in the GdMnO$_3$ single crystal. Unusual magnetic properties are due to the mismatch of the lattice parameters of the GdMnO$_3$ thin film and the SrTiO$_3$ substrate.

Received: 01.08.2013

DOI: 10.7868/S0370274X13190053