Magnetic susceptibility of the frustrated spinels ZnCr2O4, MgCr2O4 and CdCr2O4

Abstract

We analyzed the magnetic susceptibilities of several Cr spinels using two recent models for the geometrically frustrated pyrochlore lattice, the Quantum Tetrahedral Mean Field model and a Generalized Constant Coupling model. Both models can describe the experimental data for ACr2 O4 (with A = Zn, Mg, and Cd) satisfactorily, with the former yielding a somewhat better agreement with experiment for A = Zn, Mg. The obtained exchange constants for nearest and next-nearest neighbors are discussed.

4 pages, 1 figure, 1 table, conference

References in corpus (6)

• Order by distortion and string modes in pyrochlore antiferromagnet
• Probing spin correlations with phonons in the strongly frustrated magnet ZnCr2O4
• Spin-phonon coupling in antiferromagnetic chromium spinels
• Partial order from disorder in a classical pyrochlore antiferromagnet
• Spin phonon coupling in frustrated magnet CdCr${}_2$O${}_4$
• The classical Generalized Constant Coupling method for Geometrically Frustrated Magnets revisited: Microscopic formulation and effect of perturbations beyond nearest neighbor interactions

Cited by in corpus (6)

• Spin-induced symmetry breaking in orbitally ordered NiCr_2O_4 and CuCr_2O_4
• Universal exchange-driven phonon splitting in antiferromagnets
• Exciton-magnon transitions in the frustrated chromium antiferromagnets CuCrO2, alpha-CaCr2O4, CdCr2O4, and ZnCr2O4
• Evolution of magnetic properties in the normal spinel solid solution Mg(1-x)Cu(x)Cr2O4
• Features of magnetic and magnetoelectric properties, H-T phase diagram of GdCr3(BO3)4
• Thermodynamics and spin mapping of quantum excitations in a Heisenberg spin heptamer