Pressure- and Field-Tuning the Magnetostructural Phases of Mn3O4: Raman Scattering and X-Ray Diffraction Studies

Abstract

We present temperature-, magnetic-field-, and pressure-dependent Raman scattering studies of single crystal Mn3O4, combined with temperature- and field-dependent x-ray diffraction studies, revealing the novel magnetostructural phases in Mn3O4. Our temperature-dependent studies showed that the commensurate magnetic transition at T2=33K in the binary spinel Mn3O4 is associated with a structural transition from tetragonal to orthorhombic structures. Field-dependent studies showed that the onset and nature of this structural transition can be controlled with an applied magnetic field, and revealed evidence for a field-tuned quantum phase transition to a tetragonal spin-disordered phase for H||[1-10]. Pressure-dependent Raman measurements showed that the magnetic easy axis direction in Mn3O4 can be controlled---and the ferrimagnetic transition temperature increased---with applied pressure. Finally, combined pressure- and magnetic-field-tuned Raman measurements revealed a rich magnetostructural phase diagram---including a pressure- and field-induced magnetically frustrated tetragonal phase in the PH phase diagram---that can be generated in Mn3O4 with applied pressure and magnetic field.

12 pages, 13 figures, to be published in Phys. Rev. B

References in corpus (12)

• Emergent excitations in a geometrically frustrated magnet
• Probing spin correlations with phonons in the strongly frustrated magnet ZnCr2O4
• Magnetodielectric coupling in Mn3O4
• Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr${}_2$O${}_4$
• Orbital and spin chains in ZnV2O4
• Magnetic transition and orbital degrees of freedom in vanadium spinels
• Spin-lattice instability to a fractional magnetization state in the spinel HgCr2O4
• Quantum Melting of the Charge Density Wave State in 1T-TiSe2
• High pressure diffraction studies on Ca2RuO4
• Mapping the magneto-structural quantum phases of Mn3O4
• Theory of the Ordered Phase in A-site Antiferromagnetic Spinels
• Spin phonon coupling in frustrated magnet CdCr${}_2$O${}_4$

Cited by in corpus (10)

• Structural change and phase coexistence upon magnetic ordering in the magnetodielectric spinel Mn${}_3$O${}_4$
• Magnon spectra and strong spin-lattice coupling in magnetically frustrated MnB2O4 (B = Mn,V): Inelastic light scattering studies
• Orbital and spin ordering physics of the Mn${}_3$O${}_4$ spinel
• Magnons and Magnetodielectric Effects in CoCr${}_2$O${}_4$: Raman Scattering Studies
• Lattice dynamics and magnetic exchange interactions in GeCo2O4, a spinel with S = 1/2 pyrochlore lattice
• Correlated spin liquids in the quantum kagome antiferromagnet at finite field: a renormalisation group analysis
• Magnetisation plateaux of the quantum pyrochlore Heisenberg antiferromagnet
• Effects of magnetic field and twin domains on magnetostructural phase mixture in Mn3O4: Raman scattering studies of untwinned crystals
• Domain wall patterning and giant response functions in ferrimagnetic spinels
• Real-Space Magnetic Imaging of the Multiferroic Spinels MnV2O4 and Mn3O4