Evidence for orthorhombic distortions in the ordered state of ZnCr${}_2$O${}_4$: A magnetic resonance study

Abstract

We present an elaborate electron-spin resonance study of the low-energy dynamics and magnetization in the ordered phase of the magnetically frustrated spinel ZnCr${}_2$O${}_4$. We observe several resonance modes corresponding to different structural domains and found that the number of domains can be easily reduced by field-cooling the sample through the transition point. To describe the observed antiferromagnetic resonance spectra it is necessary to take into account an orthorhombic lattice distortion in addition to the earlier reported tetragonal distortion which both appear at the antiferromagnetic phase transition.

RevTEX, 9 pages, 6 figures, submitted to PRB

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Cited by in corpus (8)

• Spin-induced symmetry breaking in orbitally ordered NiCr_2O_4 and CuCr_2O_4
• Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets CdCr2O4 and ZnCr2O4
• The Sensitivity of the Magnetic Properties of the ZnCr2O4 and MgCr2O4 Spinels to Non-stoichiometry
• Magnetoelastic coupling in triangular lattice antiferromagnet CuCrS2
• Manifolds of magnetic ordered states and excitations in the almost Heisenberg pyrochlore antiferromagnet MgCr2O4
• Evolution of magnetic properties in the normal spinel solid solution Mg(1-x)Cu(x)Cr2O4
• Numeric calculation of antiferromagnetic resonance frequencies for the noncollinear antiferromagnet
• On the complexity of spinels: Magnetic, electronic, and polar ground states