Journal article

Publication year: 1996

Pages: L359-L362

Journal: Journal of Physics: Condensed Matter

Volume number: 8

Issue number: 25

ISSN: 0953-8984

DOI Link: https://doi.org/10.1088/0953-8984/8/25/001

Publisher: IOP Publishing

Abstract: 
Measurements of the electron spin-lattice relaxation time T-1 of a paramagnetic hole centre in x-irradiated CaMoO4 are presented. The temperature dependence of T-1 indicates the interaction of the hole centre with an acoustical branch and an optical branch with B-g symmetry via Raman processes. The spin-lattice relaxation time T-1 shows a striking anomaly at 52 K, typical of a second-order phase transition. We explain the T-1-behaviour in terms of a softening of the optical phonon branch. At the same temperature, anomalies of the phase memory time T-M and the dielectric permittivity were also observed. It is concluded that CaMoO4 undergoes a second-order ferroelastic phase transition at T-C = 52 K.

Harvard Citation style: Simon, J., Banys, J., Hoentsch, J., Volkel, G., Bottcher, R., Hofstaetter, A., et al. (1996) Indications of a ferroelastic phase transition in CaMoO4 from pulsed electron paramagnetic resonance and dielectric studies, Journal of Physics: Condensed Matter, 8(25), pp. L359-L362. https://doi.org/10.1088/0953-8984/8/25/001

APA Citation style: Simon, J., Banys, J., Hoentsch, J., Volkel, G., Bottcher, R., Hofstaetter, A., & Scharmann, A. (1996). Indications of a ferroelastic phase transition in CaMoO4 from pulsed electron paramagnetic resonance and dielectric studies. Journal of Physics: Condensed Matter. 8(25), L359-L362. https://doi.org/10.1088/0953-8984/8/25/001