Andronenko, Sergey I., Andronenko, Roza R. and Misra, Sushil K. (2012) An X- and Q-band Gd3+ EPR study of a single crystal of EuAlO3: EPR linewidth variation with temperature and low-symmetry effects. Physica B: Condensed Matter, 407 (8). pp. 1203-1208. ISSN 09214526
Preview |
Text (application/pdf)
625kBAn_X-_and_Q-band_Gd3+_EPR_study_of_a_single_crystal_of_EuAlO3.pdf - Accepted Version |
Official URL: http://dx.doi.org/10.1016/j.physb.2012.01.094
Abstract
Detailed electron paramagnetic resonance (EPR) studies on a single crystal of Gd3+-doped Van-Vleck compound EuAlO3, potentially a phosphorescent/luminescent/laser material, with the Gd3+ ion substituting for the Eu3+ ion, were carried out at X-band (9.2 GHz) over the 77–400 K temperature range. They provide new physical results on magnetic properties of the Eu3+ ion in a low symmetry environment. The asymmetry exhibited by the variation of the Gd3+ EPR line positions for the orientations of the external magnetic field about the Z and X magnetic axes in the ZX plane was ascribed to the existence of low, monoclinic, site symmetry, as revealed by the significant values of the spin-Hamiltonian (SH) parameters and , estimated by fitting all the observed EPR line positions at room temperature for the orientation of the magnetic field in the magnetic ZX plane using a least-square fitting procedure. The temperature dependence of the Gd3+ EPR linewidth is interpreted to be due to the “life-time” broadening, caused by dynamical exchange and dipolar interactions between the impurity Gd3+ ions and the host Eu3+ ions.
Divisions: | Concordia University > Faculty of Arts and Science > Physics |
---|---|
Item Type: | Article |
Refereed: | Yes |
Authors: | Andronenko, Sergey I. and Andronenko, Roza R. and Misra, Sushil K. |
Journal or Publication: | Physica B: Condensed Matter |
Date: | 2012 |
Digital Object Identifier (DOI): | 10.1016/j.physb.2012.01.094 |
Keywords: | Gd3+ ion EPR Spin-Hamiltonian parameters EuAlO3 Van-Vleck paramagnet X-band Q-band Lifetime broadening Low symmetry |
ID Code: | 973688 |
Deposited By: | KATHARINE HALL |
Deposited On: | 23 Mar 2012 13:42 |
Last Modified: | 18 Jan 2018 17:37 |
Repository Staff Only: item control page