Heat-capacity anomalies in the presence of high magnetic fields in the spin-chain compound, Ca3Co2O6

Abstract

Heat-capacity behavior in the presence of externally applied magnetic field (H) up to 140 kOe is investigated (2-35 K) for the quasi-1-dimensional compound, Ca3Co2O6, believed to order magnetically with the so-called partially disordered anti-ferromagnetic structure. The results reveal that there is a shift of the magnetic transition occurring around 24 K to a marginally higher temperature (by 0.5 K) as H is increased from 10 to 30 kOe, uncharacteristic of anti-ferromagnets. No peak attributable to magnetic ordering could be observed in the entire field range of investigation in the vicinity of the second magnetic transition, occurring around 10 K. However, hysteresis studies of H-dependence of C indicate a subtle change in the magnetic structure as the T is lowered across 10 K.

arXiv commentJ. Magn. Magn. Mater. (Letters)

References in corpus (8)

• Specific heat and magnetization study on single crystals of a frustrated, quasi one-dimensional oxide: Ca3Co2O6
• Magnetic behavior of Co ions in the exotic spin-chain compound,Ca3Co2O6, from 59Co NMR studies
• The Origin of Magnetic Interactions in Ca3Co2O6
• Magnetic behaviour of quasi-one-dimensional oxides, Ca${}_3$Co${}_{(}1+x)$Mn${}_{1-x}$O${}_6$
• Magnetic frustration in a stoichiometric spin-chain compound, Ca${}_3$CoIrO${}_6$
• Extended moment formation and magnetic ordering in the trigonal chain compound Ca3Co2O6
• Magnetic anomalies in the spin chain system, Sr${}_3$Cu${}_{1-x}$Zn${}_x$IrO${}_6$
• Long range magnetic ordering in a spin-chain compound, Ca${}_3$CuMnO${}_6$, with multiple bond distances

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• Magnetic behavior of nano crystals of a spin-chain system, Ca3Co2O6: Absence of multiple steps in the low temperature isothermal magnetization
• Origin of Ising magnetism in Ca3Co2O6 unveiled by orbital imaging
• Frustrated Ising chains on the triangular lattice in Sr${}_3$NiIrO${}_6$
• Negative chemical pressure effects induced by Y substitution for Ca on the exotic magnetic behavior of spin-chain compound, Ca3Co2O6
• Modifications in the frustrated magnetism, oxidation state of Co and magnetoelectric coupling effects induced by a partial replacement of Ca by Gd in the spin chain compound Ca3Co2O6
• Effect of a small disruption of the Ca site on the geometrically frustrated magnetic behavior of Ca3CoRhO6
• Magnetic behavior of the spin-chain compounds,Ca3CuIrO6 and Ca3CuRhO6
• 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${}_6$
• Novel dielectric anomalies due to spin-chains above and below Neel temperature in Ca3Co2O6