Magnetic structure and phase diagram of the frustrated spinel Cd1−xZnxCr2Se4

Loudghiri, E.; Belayachi, A.; Noguès, M.; Taïbi, M.; Cruz, M.M.; Godinho, M.

doi:10.1016/j.jmmm.2007.08.005

Cited by 12 publications

(4 citation statements)

References 43 publications

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“…In fact, the magnetic ordered state in the spinel AB 2 X 4 is determined by the competition between the nearest-neighbor ferromagneitc superexchange B-X-B and high-order-neighbor antiferromagnetic B-X-A-B-X interactions, while the ferromagnetic superexchange is dominant in the CdCr 2 Se 4 system [5]. As a result, the mechanism of the magnetic phase transition of this system is considered as the 90 • Cr 3+ -Se 2− -Cr 3+ superexchange, which is in accordance with the Kanamori-Goodenough rules [12,13].…”

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confidence: 57%

Critical properties of the 3D-Heisenberg ferromagnet \chem{CdCr_{2}Se_{4}}

Zhang

Fan

et al. 2010

EPL

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The critical properties of the ferromagnet CdCr2Se4 around the paramagneticferromagnetic phase transition have been investigated. It is found that the 3D-Heisenberg model is the best one to describe the critical phenomena around the critical point. Critical exponents β = 0.337 ± 0.03 and γ = 1.296 ± 0.109 at TC = 130.48 ± 0.34 are obtained. In addition, the critical exponent δ = 4.761 ± 0.129 is determined separately from the isothermal magnetization at TC . These critical exponents fulfill the Widom scaling relation δ = 1 + γ/β. Based on these critical exponents, the magnetization-field-temperature (M -H-T ) data around TC collapses into two curves obeying the single scaling equation M (H, ε) = ε β f±(H/ε β+γ ). Although the 3D-Heisenberg model is the most satisfactory model to describe this system, critical exponents for CdCr2Se4 are slightly smaller than the theoretical exponents (β = 0.36, γ = 1.39 and δ = 4.8). This indicates that the exchange interaction J(r) decays slower than r −5 in this system, which can be attributed to the spin-lattice coupling.

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confidence: 57%

Critical properties of the 3D-Heisenberg ferromagnet \chem{CdCr_{2}Se_{4}}

Zhang

Fan

et al. 2010

EPL

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“…Solid solutions of thiospinels and selenospinels have received considerable attention because of their interesting electrical and magnetic properties, which can E-mail address: rachidmasrour@hotmail.com. vary greatly as a function of composition [1][2][3][4][5][6][7]. The compounds HgCr 2 S 4 , CdCr 2 S 4 , HgCr 2 Se 4 and CdCr 2 Se 4 are known to be ferromagnetic spinels [8][9][10][11], whereas ZnCr 2 S 4 and ZnCr 2 Se 4 are known to be antiferromagnetic [12,13].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of the spinel systems ACr2X4 (A = Zn, Cd, Hg; X = S, Se)

Masrour

2010

Journal of Alloys and Compounds

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“…coexistence of ferromagnetism and ferroelectricity [1,2], complex spin order and spin dimerization [3][4][5], spin-orbital liquid [6], orbital glass [7], heavy-fermion properties [8], large magnetostriction and negative thermal expansion [9], giant magnetoresistance [10][11][12][13][14][15][16][17], spin glass state [16][17][18][19][20][21][22][23][24][25][26][27][28] and thermoelectric effect [29]. One has to admit that the giant magnetoresistance effect and spin glass state effect can be useful in the switching facilities and spintronics.…”

Section: Introductionmentioning

confidence: 99%