Element-specific field-induced spin reorientation and an unusual tetracritical point in MnCr2S4

Abstract

The ferrimagnetic spinel MnCr2S4 shows a variety of magnetic-field-induced phase transitions owing to bond frustration and strong spin-lattice coupling. However, the site-resolved magnetic properties at the respective field-induced phases in high magnetic fields remain elusive. Our soft x-ray magnetic circular dichroism studies up to 40 T directly evidence element-selective magnetic-moment reorientations in the field-induced phases. The complex magnetic structures are further supported by entropy changes extracted from magnetocaloric-effect measurements. Moreover, thermodynamic experiments reveal an unusual tetracritical point in the H-T phase diagram of MnCr2S4 due to strong spin-lattice coupling.

18 pages, 8 figures

References in corpus (8)

• Spin-phonon coupling in antiferromagnetic chromium spinels
• Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs${}_2$CuCl${}_4$
• Adiabatic physics of an exchange-coupled spin-dimer system: magnetocaloric effect, zero-point fluctuations, and possible two-dimensional universal behavior
• Spin-lattice coupling in a ferrimagnetic spinel: The exotic $H$-$T$ phase diagram of MnCr${}_2$S${}_4$ up to 110 T
• On critical models with $N\le 4$ scalars in $d=4-\epsilon$
• Multiferroic spin-superfluid and spin-supersolid phases in MnCr2S4
• $\alpha$-$\beta$ and $\beta$-$\gamma$ phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect
• X-ray magnetic circular dichroism characterization of GaN/Ga1-xMnxN digital ferromagnetic heterostructure

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• On the complexity of spinels: Magnetic, electronic, and polar ground states
• High-field phase diagram of the chiral-lattice antiferromagnet Sr(TiO)Cu4(PO4)4