Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr${}_2$O${}_4$

Abstract

Using elastic and inelastic neutron scattering we show that a cubic spinel, CdCr${}_2$O${}_4$, undergoes an elongation along the c-axis ($c>a=b$) at its spin-Peierls-like phase transition at $T_N$ = 7.8 K. The Néel phase ($T<T_N$) has an incommesurate spin structure with a characteristic wave vector \textbf{Q}${}_M$ = (0,$\delta$,1) with $\delta \sim$ 0.09 and with spins lying on the $ac$-plane. This is in stark contrast to another well-known Cr-based spinel, ZnCr${}_2$O${}_4$, that undergoes a c-axis contraction and a commensurate spin order. The magnetic excitations of the incommensurate Néel state has a weak anisotropy gap of 0.6 meV and it consists of at least three bands extending up to 5 meV.

PRL in press

References in corpus (8)

• Spin Ice State in Frustrated Magnetic Pyrochlore Materials
• Emergent excitations in a geometrically frustrated magnet
• Properties of a classical spin liquid: the Heisenberg pyrochlore antiferromagnet
• Low-temperature properties of classical, geometrically frustrated antiferromagnets
• Pyrochlore Antiferromagnet: A Three-Dimensional Quantum Spin Liquid
• Local spin resonance and spin-Peierls-like phase transition in a geometrically frustrated antiferromagnet
• Order by distortion and string modes in pyrochlore antiferromagnet
• Spin Driven Jahn-Teller Distortion in a Pyrochlore system

Cited by in corpus (73)

• 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-phonon coupling in antiferromagnetic chromium spinels
• Dy2Ti2O7 Spin Ice: a Test Case for Emergent Clusters in a Frustrated Magnet
• Spin-lattice instability to a fractional magnetization state in the spinel HgCr2O4
• Pressure- and Field-Tuning the Magnetostructural Phases of Mn3O4: Raman Scattering and X-Ray Diffraction Studies
• Spin-driven Phonon Splitting in Bond-frustrated ZnCr2S4
• Revisiting Static and Dynamic Spin Ice Correlations in Ho2Ti2O7
• Continuum of quantum fluctuations in a three-dimensional $S=1$ Heisenberg magnet
• Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets CdCr2O4 and ZnCr2O4
• Absent pinch points and emergent clusters: further neighbour interactions in the pyrochlore Heisenberg antiferromagnet
• Magnetic coupling in CoCr_2O_4 and MnCr_2O_4: an LSDA+U study
• Experimental Realization of a Quantum Breathing Pyrochlore Antiferromagnet
• Molecular spin resonance in the geometrically frustrated MgCr2O4 magnet by inelastic neutron scattering
• Partial order from disorder in a classical pyrochlore antiferromagnet
• Noncoplanar magnetic ordering driven by itinerant electrons on the pyrochlore lattice
• Symmetry Reduction in the Quantum Kagome Antiferromagnet Herbertsmithite
• Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material LiGaCr4S8
• Magnetic excitations of the classical spin liquid MgCr2O4
• Broken parity and a chiral ground state in the frustrated magnet CdCr2O4
• Kinetically Inhibited Order in a Diamond-Lattice Antiferromagnet
• Spin phonon coupling in frustrated magnet CdCr${}_2$O${}_4$
• 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
• Crystal structures of spin-Jahn-Teller ordered MgCr_2O_4 and ZnCr_2O_4
• Emergence of highly degenerate excited states in frustrated magnet MgCr${}_2$O${}_4$
• Structural ground states of ($A,A^{\prime }$)Cr${}_2$O${}_4$($A$=Mg, Zn; $A^{\prime }$ = Co, Cu) spinel solid solutions: Spin-Jahn-Teller and Jahn-Teller effects
• Universal magnetic structure of the half-magnetization phase in Cr-based spinels
• 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
• Evidence for unidimensional low-energy excitations as the origin of persistent spin dynamics in geometrically frustrated magnets
• Universal exchange-driven phonon splitting in antiferromagnets
• Magnetic Transitions under Ultrahigh Magnetic Fields of up to 130 T in the Breathing Pyrochlore Antiferromagnet LiInCr4O8
• Frustration effects in antiferromagnetic molecules: the cuboctahedron
• Observation of elastic anomalies driven by coexisting dynamical spin Jahn-Teller effect and dynamical molecular spin state in paramagnetic phase of the frustrated MgCr${}_2$O${}_4$$
• Classical Spin Nematic Transition in LiGa${}_{0.95}$In${}_{0.05}$Cr${}_4$O${}_8$
• Spin ordering induced by lattice distortions in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
• Magnetization process of the breathing pyrochlore magnet CuInCr${}_4$S${}_8$ in ultra-high magnetic fields up to 150 T
• Berezinskii-Kosterlitz-Thouless Type Scenario in Molecular Spin Liquid $A$Cr${}_2$O${}_4$
• Spin-lattice-coupled order in Heisenberg antiferromagnets on the pyrochlore lattice
• Unusual UUDD magnetic chain structure of the spin-1/2 tetragonally distorted spinel GeCu2O4
• Neel to Spin-Glass-like Phase Transition versus Dilution in Geometrically Frustrated ZnCr_{2-2x}Ga_{2x}O_4
• Neutron Scattering Studies of the Breathing Pyrochlore Antiferromagnet LiGaCr${}_4$O${}_8$
• Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr${}_2$O${}_4$
• Acoustic study for dynamical molecular-spin state without undergoing magnetic phase transition in spin-frustrated ZnFe${}_2$O${}_4$
• Phase boundaries in alternating field quantum XY model with Dzyaloshinskii-Moriya interaction: Sustainable entanglement in dynamics
• Exciton-magnon transitions in the frustrated chromium antiferromagnets CuCrO2, alpha-CaCr2O4, CdCr2O4, and ZnCr2O4
• Magnetic and Structural Phase Transitions in the Spinel Compound Fe1+xCr2-xO4
• Evidence for orthorhombic distortions in the ordered state of ZnCr${}_2$O${}_4$: A magnetic resonance study
• Tweaking the spin-wave dispersion and suppressing the incommensurate phase in LiNiPO${}_4$ by iron substitution
• Origin of magnetic freezing in the pyrochlore Y2Mo2O7
• Constrained DFT+$U$ approach for understanding the magnetic behaviour of ACr${}_2$O${}_4$ (A=Zn, Mg, Cd and Hg) compounds
• Lack of static lattice distortion in $T{b}_{2}T{i}_2{O}_7$
• Symmetry considerations on the magnetization process of the Heisenberg model on the pyrochlore lattice
• Effects of spin-lattice coupling and a magnetic field in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
• Signatures of a magnetic superstructure phase induced by ultrahigh magnetic fields in a breathing pyrochlore antiferromagnet
• Development of spin correlations in the geometrically frustrated triangular-lattice Heisenberg antiferromagnet CuCrO2
• Magnetic spiral induced by strong correlations in MnAu${}_2$
• Chiral magnetism and helimagnons in a pyrochlore antiferromagnet
• Half-magnetization plateaux in Cr spinels
• Ferromagnetic Cr4PtGa17: A Novel Half-Heusler-Type Compound with a Breathing Pyrochlore Lattice
• First-principles investigations into the thermodynamics of cation disorder and it's impact on electronic structure and magnetic properties of spinel $Co{\left(C{r}_{1-x}M{n}_x\right)}_2{O}_4$
• Microscopic theory of Dzyaloshinsky-Moriya interaction in pyrochlore oxides with spin-orbit coupling
• Synchrotron x-ray study of lattice vibrations in CdCr2O4
• Magnetoelectric coupling in a frustrated spinel studied using high-field scanning probe microscopy
• Magnetic Field Induced Phase Transition in Spinel GeNi2O4
• Breathing pyrochlore magnet CuGaCr${}_4$S${}_8$: Magnetic, thermodynamic, and dielectric properties
• Room Temperature Ferrimagnetism, Magnetodielectric and Exchange Bias Effect in CoFeRhO${}_4$
• On the complexity of spinels: Magnetic, electronic, and polar ground states
• Helimagnons in a chiral ground state of the pyrochlore antiferromagnets
• Dynamic Spin-Lattice Coupling and Statistical Interpretation for the Molecular-Like Excitations in Frustrated Pyrochlores
• Phase Diagram of a Spin-ice Kondo Lattice Model in a Breathing Pyrochlore Lattice
• Elastic softness of low-symmetry frustrated $A$Ti${}_2$O${}_5$ ($A$ = Co, Fe)
• Magnetic-field-induced transition from metastable spin glass to possible antiferromagnetic-ferromagnetic phase separation in $C{d}_{0.5}C{u}_{0.5}C{r}_2{O}_4$