Magnetic Structure of CsCoCl<sub>3</sub>

Mekata, Mamoru; Adachi, Ken

doi:10.1143/jpsj.44.806

Cited by 199 publications

(74 citation statements)

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“…In the Ising limit however, the frustration is not released and magnetic structures with modulated moments may be stabilized at finite temperature. In particular, in the J 1 /J 2 model on a triangular lattice, a partially disordered magnetic configuration system with only two thirds of the chains that order simultaneously has been predicted 2 and observed experimentally in CsCoCl 3 for instance 3 . The most studied compound in the frustrated regime is Ca 3 Co 2 O 6 because of its large easy-axis anisotropy which confines the moment along the chain axis.…”

Section: Introductionmentioning

confidence: 93%

Magnetic order in the frustrated Ising-like chain compoundSr3NiIrO6

et al. 2014

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We have studied the field and temperature dependence of the magnetization of single crystals of Sr3NiIrO6. These measurements evidence the presence of an easy axis of anisotropy and two anomalies in the magnetic susceptibility. Neutron powder diffraction realized on a polycrystalline sample reveals the emergence of magnetic reflections below 75 K with magnetic propagation vector k ∼ (0, 0, 1), undetected in previous neutron studies [T.N. Nguyen and H.-C zur Loye, J. Solid State Chem., 117, 300 (1995)]. The nature of the magnetic ground state, and the presence of two anomalies common to this family of material, are discussed on the basis of the results obtained by neutron diffraction, magnetization measurements, and symmetry arguments.

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Section: Introductionmentioning

confidence: 93%

Magnetic order in the frustrated Ising-like chain compoundSr3NiIrO6

et al. 2014

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“…(4) the same condition for the FM in-chain order given by Eq. (2). If the effective field is not extremely small, i.e.…”

Section: +mentioning

confidence: 99%

“…Antiferromagnetic (AFM) Ising chains form the triangular lattice in well-known Ising-chain compounds CsCoCl 3 , CsCoBr 3 [1,2,3,4]. In these substances a partial AFM interchain order (honeycomb magnetic structure) appears just below the ordering temperature.…”

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confidence: 99%

Magnetic structure and phase diagram in a spin-chain system: Ca ₃ Co ₂ O ₆

Kudasov¹

2007

Europhys. Lett.

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The low-temperature structure of the frustrated spin-chain compound Ca3Co2O6 is determined by the ground state of the 2D Ising model on the triangular lattice. At high-temperatures it transforms to the honeycomb magnetic structure. It is shown that the crossover between the two magnetic structures at 12 K arises from the entropy accumulated in the disordered chains. This interpretation is in an agreement with the experimental data. General rules for for the phase diagram of frustrated Ising chain compounds are formulated.PACS numbers: 75.25.+z, 75.30.Kz, 75.50.Ee A combination of a low dimensionality and frustration in magnetic compounds, which contain weakly bound Ising spin-chains packed into a two-dimensional (2D) frustrated lattice, gives rise to a complex magnetic behavior. Antiferromagnetic (AFM) Ising chains form the triangular lattice in well-known Ising-chain compounds CsCoCl 3 , CsCoBr 3 [1,2,3,4]. In these substances a partial AFM interchain order (honeycomb magnetic structure) appears just below the ordering temperature. While the temperature decreases, two magnetic phase transitions occur to low-temperature ferrimagnetic phases. A theoretical explanation of the magnetic structure of CsCoCl 3 , CsCoBr 3 was proposed by Mekata in the framework of a mean-field theory [1]. To describe the low-temperature phases an interaction between next nearest neighboring chains was included in the model. Recently, Ca 3 Co 2 O 6 has drawn considerable attention to a step-like magnetization curve [5,6,7,8,9]. The number of the steps in the curve depends strongly on a sweep rate of the external magnetic field and temperature [6,7,9]. Two steps become apparent in the temperature range from 12 K to 24 K [9]. The first step takes place at the zero magnetic field. Then the magnetic moment remains constant at about 1/3 of the full magnetization up to the magnetic field of 3.6 T where the second step occurs to the fully magnetized FM state. At least four equidistant steps are clearly visible below 12 K at a very low sweep rate. They are accompanied by a sizeable hysteresis. Similar phenomena were observed in other spin-chain compounds, e.g. Ca 3 CoRhO 6 [10,11].The structure of Ca 3 Co 2 O 6 consists of Co 2 O 6 chains running along the c axis. The Ca ions are situated between them. The chains are made up of alternating, facesharing CoO 6 trigonal prisms and CoO 6 octahedra. The crystalline electric field splits the energy level of Co 3+ions into the high-spin (S = 2) and low-spin (S = 0) states. The Co 3+ ions situated in the trigonal environment (CoI) are in the high-spin state and the octahedral Co sites (CoII) occurs in the low-spin state. In the last case the energy difference between the low-spin and * Electronic address: kudasov@ntc.vniief.ru high-spin states is very small and a tiny fraction of CoII sites is reported to be in the high-spin state. The crystalline electric field leads also to a very strong Ising-like anisotropy at the CoI sites. The chains form triangular lattice in the ab plane that is perpendicula...

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“…³ AEÓÖÅÑÌ ÔÕÑÓÑÐÞ, ÄÇÎËÚËÐÂ ÏÂÅÐËÕÐÑÅÑ ÏÑÏÇÐÕÂ ÐÂÔÞÜÇÐËâ ÒÓË ÐËÊÍËØ ÕÇÏÒÇÓÂÕÖÓÂØ ÔÑÔÕÂÄÎâÇÕ ÑÍÑÎÑ 5 m B ÐÂ ×ÑÓÏÖÎßÐÖá ÇAEËÐËÙÖ [37,38] [57,58].…”

Section: £äçAeçðëçmentioning

confidence: 99%