Magnetic frustration in a stoichiometric spin-chain compound, Ca${}_3$CoIrO${}_6$

Abstract

The temperature dependent ac and dc magnetization and heat capacity data of Ca${}_3$CoIrO${}_6$, a spin-chain compound crystallizing in a K${}_4$CdCl${}_6$-derived rhombohedral structure, show the features due to magnetic ordering of a frustrated-type below about 30 K, however without exhibiting the signatures of the so-called "partially disordered antiferromagnetic structure" encountered in the isostructural compounds, Ca${}_3$Co${}_2$O${}_6$ and Ca${}_3$CoRhO${}_6$. This class of compounds thus provides a variety for probing the consequences of magnetic frustration due to topological reasons in stoichiometric spin-chain materials, presumably arising from subtle differences in the interchain and intrachain magnetic coupling strengths. This compound presents additional interesting situations in the sense that, ac susceptibility exhibits a large frequency dependence in the vicinity of 30 K uncharacteristic of conventional spin-glasses, with this frustrated magnetic state being robust to the application of external magnetic fields.

Physical Review (Rapid Communications), in press

References in corpus (6)

• Superparamagnetic-like ac susceptibility behavior in a "partially disordered antiferromagnetic" compound, Ca${}_3$CoRhO${}_6$
• Frustration driven lattice distortion; an NMR investigation of Y2Mo2O7
• Inhomogeneous magnetism in single crystalline Sr${}_3$CuIrO${}_{6+\delta }$: Implications to phase-separation concepts
• Magnetic anomalies in the spin chain system, Sr${}_3$Cu${}_{1-x}$Zn${}_x$IrO${}_6$
• Sr${}_3$CuIrO${}_6$, a spin-chain compound with random ferromagnetic-antiferromagnetic interactions
• Magnetic and electrical resistance behaviour of the oxides, Ca${}_{3-x}$Y${}_x$LiRuO${}_6$ (x= 0.0, 0.5 and 1.0)

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• Long range magnetic ordering in a spin-chain compound, Ca${}_3$CuMnO${}_6$, with multiple bond distances
• Magnetic behavior of the spin-chain compounds,Ca3CuIrO6 and Ca3CuRhO6
• Effect of a small disruption of the Ca site on the geometrically frustrated magnetic behavior of Ca3CoRhO6
• Magnetic behavior of spin-chain compounds, Sr3ZnRhO6 and Ca3NiMnO6, from heat capacity and ac susceptibility studies
• A Colossal Electroresistance response, accompanied by metal-insulator transition, in a mixed-valent vanadate
• Na${}_5$Co${}_{15.5}$Te${}_6$O${}_{36}$: an $S$ = 1/2 stacked Ising kagome antiferromagnet with a partially disordered ground state
• Magnetic anisotropy and geometrical frustration in the Ising spin-chain system Sr5Rh4O12
• Three-dimensional ferrimagnetic ground state of triangular-lattice system Ca3Co2O6