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 S.; Zherlitsyn S.; Chiatti Olivio; Sytcheva Arina M.; Wosnitza Joachim; Moessner Roderich; Zhitomirsky Michael; Lemmens Peter; Tsurkan Vladimir; Loidl Alois

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BHATTACHARJEE, Subhro S., ZHERLITSYN, S., CHIATTI, Olivio, SYTCHEVA, Arina M., WOSNITZA, Joachim, MOESSNER, Roderich, ZHITOMIRSKY, Michael, LEMMENS, Peter, TSURKAN, Vladimir, LOIDL, Alois. 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, 2011, vol. 83, p. 0. ISSN 1098-0121. DOI: https://doi.org/10.1103/PhysRevB.83.184421

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Physical Review B - Condensed Matter and Materials Physics

Volumul 83 / 2011 / ISSN 1098-0121 /ISSNe 1550-235X

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

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

Pag. 0-0

Bhattacharjee Subhro S.¹²³⁴⁵, Zherlitsyn S.⁶, Chiatti Olivio⁶⁴, Sytcheva Arina M.⁶, Wosnitza Joachim⁶, Moessner Roderich¹, Zhitomirsky Michael⁷, Lemmens Peter⁸, Tsurkan Vladimir⁹¹⁰, Loidl Alois⁹

¹ Institutul Max Planck pentru fizica sistemelor complexe, Dresden,
² Indian Institute of Science, Bangalore,
³ University of Toronto,
⁴ McMaster University,
⁵ University College London,
⁶ Helmholtz-Zentrum Dresden-Rossendorf,
⁷ Joseph Fourier University,
⁸ Technical University of Braunschweig,
⁹ University of Augsburg,
¹⁰ Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 29 iunie 2023

Rezumat

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.

Cuvinte-cheie
Spinell, magnetic properties, Pyrochlore