Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet CdCr2O4: High-field and temperature-induced anomalies of the elastic constants

Bhattacharjee, Subhro and Zherlitsyn, S and Chiatti, O and Sytcheva, A and Wosnitza, J and Moessner, R and Zhitomirsky, ME and Lemmens, P and Tsurkan, V and Loidl, A (2011) Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet CdCr2O4: High-field and temperature-induced anomalies of the elastic constants. In: Physical Review B: Condensed Matter and Materials Physics, 83 (18).

PDF Interplay_of_spin.pdf - Published Version Restricted to Registered users only Download (676kB) | Request a copy

Abstract

Temperature and magnetic field studies of the elastic constants of the chromium spinel CdCr2O4 show pronounced anomalies related to strong spin-phonon coupling in this frustrated antiferromagnet. A detailed comparison of the longitudinal acoustic mode propagating along the 111] direction with a theory based on an exchange-striction mechanism leads to an estimate of the strength of the magnetoelastic interaction. The derived spin-phonon coupling constant is in good agreement with previous determinations based on infrared absorption. Further insight is gained from intermediate and high magnetic field experiments in the field regime of the magnetization plateau. The role of the antisymmetric Dzyaloshinskii-Moriya interaction is discussed.

Item Type:	Journal Article
Publication:	Physical Review B: Condensed Matter and Materials Physics
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Jun 2011 07:03
Last Modified:	08 Jan 2013 06:13
URI:	http://eprints.iisc.ac.in/id/eprint/38211

Actions (login required)

View Item