Geometrically frustrated magnetic behavior of Sr3NiRhO6 and Sr3NiPtO6

Abstract

The results of ac and dc magnetic susceptibility isothermal magnetization and heat-capacity measurements as a function of temperature (T) are reported for Sr3NiRhO6 and Sr3NiPtO6 containing magnetic chains arranged in a triangular fashion in the basal plane and crystallizing in K4CdCl6-derived rhombohedral structure. The results establish that both the compounds are magnetically frustrated, however in different ways. In the case of the Rh compound, the susceptibility data reveal that there are two magnetic transitions, one in the range 10 -15 K and the other appearing as a smooth crossover near 45 K, with a large frequency dependence of ac susceptibility in the range 10 to 40 K; in addition, the features in C(T) are smeared out at these temperatures. The magnetic properties are comparable to those of previously known few compounds with partially disordered antiferromagnetic structure. On the other hand, for Sr3NiPtO6, there is no evidence for long-range magnetic ordering down to 1.8 K despite large value of paramagnetic Curie temperature.

arXiv commentA slightly different version from that of PRB version (that is to appear in print). Phys, Rev, B, in press

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• Electronic and magnetic properties of a quasi-one-dimensional spin chain system, Sr${}_3$NiRhO${}_6$
• Possible realization of three-dimensional quantum spin liquid behavior in HoVO4
• Partially disordered antiferromagnetism and multiferroic behavior in a frustrated Ising system, CoCl${}_2$-2SC(NH${}_2$)${}_2$
• Magnetic excitations of the Cu${}^{2+}$ quantum spin chain in Sr${}_3$CuPtO${}_6$
• Spin-lattice and electron-phonon coupling in 3$d$/5$d$ hybrid Sr${}_3$NiIrO${}_6$
• A Colossal Electroresistance response, accompanied by metal-insulator transition, in a mixed-valent vanadate
• Study of magnetic interactions in a spin liquid, Sr3NiPtO6 using density functional approach
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• Role of crystal field ground state in the classical spin-liquid behavior of a quasi-one dimensional spin-chain system Sr3NiPtO6
• Magnetic ground state and excitations in mixed 3$d$-4$d$ quasi-1D spin-chain oxide Sr${}_3$NiRhO${}_6$