Spin-phonon coupling in antiferromagnetic chromium spinels

Abstract

The temperature dependence of eigenfrequencies and intensities of the IR active modes has been investigated for the antiferromagnetic chromium spinel compounds CdCr2O4, ZnCr2O4, ZnCr2S4, ZnCr2Se4, and HgCr2S4 by IR spectroscopy for temperatures from 5 K to 300 K. At the transition into the magnetically ordered phases, and driven by spin-phonon coupling, most compounds reveal significant splittings of the phonon modes. This is true for geometrically frustrated CdCr2O4, and ZnCr2O4, for bond frustrated ZnCr2S4 and for ZnCr2Se4, which also is bond frustrated, but dominated by ferromagnetic exchange. The pattern of splitting is different for the different compounds and crucially depends on the nature of frustration and of the resulting spin order. HgCr2S4, which is almost ferromagnetic, exhibits no splitting of the eigenfrequencies, but shows significant shifts due to ferromagnetic spin fluctuations.

15 pages, 6 figures

References in corpus (13)

• Relaxor ferroelectricity and colossal magnetocapacitive coupling in ferromagnetic CdCr2S4
• Emergent excitations in a geometrically frustrated magnet
• Order by distortion and string modes in pyrochlore antiferromagnet
• Spin Driven Jahn-Teller Distortion in a Pyrochlore system
• Probing spin correlations with phonons in the strongly frustrated magnet ZnCr2O4
• Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr${}_2$O${}_4$
• Colossal magnetocapacitance and colossal magnetoresistance in HgCr2S4
• Spin-Peierls phases in pyrochlore antiferromagnets
• Magnetic-induced phonon anisotropy in ZnCr${}_2$O${}_4$ from first principles
• Spin-driven Phonon Splitting in Bond-frustrated ZnCr2S4
• Broken parity and a chiral ground state in the frustrated magnet CdCr2O4
• Spin-phonon coupling in ZnCr2Se4
• Experimental evidence for competition of antiferromagnetic and ferromagnetic correlations in HgCr2S4

Cited by in corpus (44)

• Magnetoelasticity in ACr2O4 spinel oxides
• Breathing Pyrochlore Lattice Realized in A-Site Ordered Spinel Oxides LiGaCr4O8 and LiInCr4O8
• Electronic band structure and exchange coupling constants in ACr2X4 spinels
• Spin-induced symmetry breaking in orbitally ordered NiCr_2O_4 and CuCr_2O_4
• Magnetic order induced crystal symmetry lowering in ACr${}_2$O${}_4$ ferrimagnetic spinels
• Magnetic phase evolution in the spinel compounds Zn${}_{1-x}$Co${}_x$Cr${}_2$O${}_4$
• Unconventional magnetostructural transition in CoCr2O4 at high magnetic fields
• Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets CdCr2O4 and ZnCr2O4
• Spin Frustration and Magnetic Exchange in Cobalt Aluminum Oxide Spinels
• Colossal Electroresistance and Colossal Magnetoresistance in Spinel Multiferroic CdCr2S4
• Magnetic excitations of the classical spin liquid MgCr2O4
• Optical Spectroscopy in CoO: Phonons, Electric, and Magnetic Excitations
• Polar phonons and spin-phonon coupling in HgCr2S4 and CdCr2S4
• Spin-driven Phase Transitions in ZnCr${}_2$Se${}_4$ and ZnCr${}_2$S${}_4$ Probed by High Resolution Synchrotron X-ray and Neutron Powder Diffraction
• Spin phonon coupling in frustrated magnet CdCr${}_2$O${}_4$
• Crystal structures of spin-Jahn-Teller ordered MgCr_2O_4 and ZnCr_2O_4
• Magnetic susceptibility of the frustrated spinels ZnCr2O4, MgCr2O4 and CdCr2O4
• Magnetic and Structural Properties of A-Site Ordered Chromium Spinel Sulfides: Alternating Antiferromagnetic and Ferromagnetic Interactions in the Breathing Pyrochlore Lattice
• Magnetic-order induced phonon splitting in MnO from far-infrared spectroscopy
• Frustrated Magnetism in Fluoride and Chalcogenide Pyrochlore Lattice Materials
• Interplay of Spin and Lattice Degrees of Freedom in the Frustrated Antiferromagnet CdCr_2O_4: High-field and Temperature Induced Anomalies of the Elastic Constants
• Elastic and magnetic effects on the infrared phonon spectra of MnF2
• Pseudo-Goldstone magnons in the frustrated S=3/2 Heisenberg helimagnet ZnCr2Se4 with a pyrochlore magnetic sublattice
• Intrinsic exchange bias in Zn${}_x$Mn${}_{3-x}$O${}_4$ ($x\le 1$) solid solutions
• Far-infrared optical excitations in multiferroic TbMnO_3
• Spin-orbiton and quantum criticality in FeSc2S4
• Magneto-structural transitions in a frustrated magnet at high fields
• Spin ordering induced by lattice distortions in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
• Optical properties of ZnCr2Se4 - Spin-phonon coupling and electronic d-d-like excitations
• High-resolution neutron depolarization microscopy of the ferromagnetic transitions in Ni${}_3$Al and HgCr${}_2$Se${}_4$ under pressure
• Optical conductivity in multiferroic GaV${}_4$S${}_8$ and GeV${}_4$S${}_8$: Phonons and electronic transitions
• Negative thermal expansion in the plateau state of a magnetically-frustrated spinel
• Lattice dynamics and phonon dispersion of van der Waals layered ferromagnet Fe3GaTe2
• Strong magneto-optical effects in ACr2O4 A=Fe, Co spinel oxides generated by tetrahedrally coordinated transition metal ions
• Magnetic-field dependence of low-energy magnons, anisotropic heat conduction, and spontaneous relaxation of magnetic domains in the cubic helimagnet ZnCr2Se4
• Study of negative thermal expansion in the frustrated spinel ZnCr2Se4
• Element-specific field-induced spin reorientation and an unusual tetracritical point in MnCr2S4
• Chiral magnetism and helimagnons in a pyrochlore antiferromagnet
• Evolution of optical properties of chromium spinels CdCr${}_2$O${}_4$, HgCr${}_2$S${}_4$, and ZnCr${}_2$Se${}_4$ under high pressure
• Electronic Origin of Half-metal to Semiconductor Transition and Colossal Magnetoresistance in Spinel HgCr2Se4
• Transverse acoustic phonon anomalies at intermediate wavevectors in MgV${}_2$O${}_4$
• Synchrotron x-ray study of lattice vibrations in CdCr2O4
• On the complexity of spinels: Magnetic, electronic, and polar ground states
• One-third magnetization plateau in a spin-1 kagome magnet BaNi${}_3$(AsO${}_4$)${}_2$(OH)${}_2$