Magnetic resonance in a pyrochlore antiferromagnet Gd2Ti2O7
S. S. Sosin, A. I. Smirnov, L. A. Prozorova, G. Balakrishnan, M. E., Zhitomirsky
TL;DR
This study uses electron spin resonance to investigate the magnetic properties of the frustrated pyrochlore Gd2Ti2O7 across various phases, revealing detailed spectroscopic and magnetic behaviors.
Contribution
It provides the first comprehensive ESR analysis of Gd2Ti2O7 across paramagnetic and ordered phases, identifying characteristic resonance features and soft modes.
Findings
Paramagnetic resonance g-factor about 2.0
Temperature-dependent linewidth observed
Detection of weakly-dispersive soft modes in high-field phase
Abstract
Electron spin resonance study of frustrated pyrochlore Gd2Ti2O7 is performed in a wide frequency band for a temperature range 0.4-30 K, which covers paramagnetic and magnetically ordered phases. The paramagnetic resonance reveals the spectroscopic g-factor about 2.0 and a temperature dependent linewidth. In ordered phases magnetic resonance spectra are distinctive for a nonplanar cubic (or tetrahedral) antiferromagnet with an isotropic susceptibility. In the high-field saturated phase, weakly-dispersive soft modes are observed and their field evolution is traced.
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