Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet ${\mathbf{CdCr}}_{2}{\mathbf{O}}_{4}$: High-field and temperature-induced anomalies of the elastic constants

Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet ${CdCr}_{2} O_{4}$ : High-field and temperature-induced anomalies of the elastic constants

Subhro Bhattacharjee, S. Zherlitsyn, O. Chiatti, A. Sytcheva, J. Wosnitza, R. Moessner, M. E. Zhitomirsky, P. Lemmens, V. Tsurkan, and A. Loidl

Phys. Rev. B 83, 184421 – Published 19 May 2011

Abstract

Temperature and magnetic field studies of the elastic constants of the chromium spinel ${CdCr}_{2} O_{4}$ 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.

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Received 17 November 2010

DOI:https://doi.org/10.1103/PhysRevB.83.184421

Authors & Affiliations

Subhro Bhattacharjee^1,2,*, S. Zherlitsyn³, O. Chiatti^3,†, A. Sytcheva³, J. Wosnitza³, R. Moessner¹, M. E. Zhitomirsky⁴, P. Lemmens⁵, V. Tsurkan^6,7, and A. Loidl⁶

¹Max-Planck-Institut für Physik komplexer Systeme, Dresden D-01187, Germany
²Department of Physics, Indian Institute of Science, Bangalore-560012, India
³Hochfeld-Magnetlabor Dresden, Helmholtz-Zentrum Dresden Rossendorf, Dresden D-01314, Germany
⁴SPSMS, UMR-E9001 CEA-INAC/UJF, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
⁵IPKM, Technische Universität Braunschweig, Braunschweig D-38106, Germany
⁶Universität Augsburg, Augsburg D-86159, Germany
⁷Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau MD-2028, Republic of Moldova

^*subhro@physics.utoronto.ca. Present address: Department of Physics, University of Toronto, Ontario M5S 1A7, Canada; Department of Physics, and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
^†Present address: London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London WC1H 0AH, United Kingdom.

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Vol. 83, Iss. 18 — 1 May 2011

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Physical Review B

covering condensed matter and materials physics

Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet ${CdCr}_{2} O_{4}$ : High-field and temperature-induced anomalies of the elastic constants

Subhro Bhattacharjee, S. Zherlitsyn, O. Chiatti, A. Sytcheva, J. Wosnitza, R. Moessner, M. E. Zhitomirsky, P. Lemmens, V. Tsurkan, and A. Loidl

Phys. Rev. B 83, 184421 – Published 19 May 2011

Abstract

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Physical Review B

covering condensed matter and materials physics

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

Subhro Bhattacharjee, S. Zherlitsyn, O. Chiatti, A. Sytcheva, J. Wosnitza, R. Moessner, M. E. Zhitomirsky, P. Lemmens, V. Tsurkan, and A. Loidl

Phys. Rev. B 83, 184421 – Published 19 May 2011

Abstract

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Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet ${CdCr}_{2} O_{4}$ : High-field and temperature-induced anomalies of the elastic constants