Ferrimagnetism of the magnetoelectric compound Cu${}_2$OSeO${}_3$ probed by ${}^{77}$Se NMR

Abstract

We present a thorough ${}^{77}$Se NMR study of a single crystal of the magnetoelectric compound Cu${}_2$OSeO${}_3$. The temperature dependence of the local electronic moments extracted from the NMR data is fully consistent with a magnetic phase transition from the high-T paramagnetic phase to a low-T ferrimagnetic state with 3/4 of the Cu${}^{2+}$ ions aligned parallel and 1/4 aligned antiparallel to the applied field of 14.09 T. The transition to this 3up-1down magnetic state is not accompanied by any splitting of the NMR lines or any abrupt modification in their broadening, hence there is no observable reduction of the crystalline symmetry from its high-T cubic \textit{P}2${}_1$3 space group. These results are in agreement with high resolution x-ray diffraction and magnetization data on powder samples reported previously by Bos {\it et al.} [Phys. Rev. B, {\bf 78}, 094416 (2008)]. We also develop a mean field theory description of the problem based on a microscopic spin Hamiltonian with one antiferromagnetic ($J_{\text{afm}}\simeq 68$ K) and one ferromagnetic ($J_{\text{fm}}\simeq -50$ K) nearest-neighbor exchange interaction.

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• Magnetically driven ferroelectric order in Ni${}_3$V${}_2$O${}_8$
• Ferroelectric polarization flop in a frustrated magnet MnWO${}_4$ induced by magnetic fields
• Spin amplitude modulation driven magnetoelectic coupling in the new multiferroic FeTe${}_2$O${}_5$Br

Cited by in corpus (20)

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• Strong Dzyaloshinskii-Moriya Interaction and Origin of Ferroelectricity in Cu2OSeO3
• The quantum origins of skyrmions and half-skyrmions in Cu2OSeO3
• Magnetoelectric Resonances and Predicted Microwave Diode Effect of Skyrmion Crystal in Multiferroic Chiral-Lattice Magnet
• Electrical detection of spiral spin structures in Pt|Cu_2OSeO_3 heterostructures
• Low spin wave damping in the insulating chiral magnet Cu${}_2$OSeO${}_3$
• Magnetoelectric effects in single crystals of the cubic ferrimagnetic helimagnet Cu2OSeO3
• Establishing the fundamental magnetic interactions in the chiral skyrmionic Mott insulator Cu2OSeO3 by terahertz electron spin resonance
• Ballistic magnon heat conduction and possible Poiseuille flow in the helimagnetic insulator Cu${}_2$OSeO${}_3$
• CaCu2(SeO3)2Cl2: spin-1/2 Heisenberg chain compound with complex frustrated interchain couplings
• Spin excitations in the skymion host Cu2OSeO3
• All-electrical detection of skyrmion lattice state and chiral surface twists
• Multifunctional Oxides for Topological Magnetic Textures by Design
• Inelastic light scattering in the spin cluster Mott insulator Cu${}_2$OSeO${}_3$
• Growth and helicity of non-centrosymmetric Cu${}_2$OSeO${}_3$ crystals
• Cu2OSeO3 Turns Trigonal with Structural Transformation and Implications for Skyrmions
• Seeded Chemical Vapor Transport Growth of Cu${}_2$OSeO${}_3$
• Investigations of the size distribution and magnetic properties of nanoparticles of Cu${}_2$OSeO${}_3$