Magnetic phase diagram of diluted spinel Zn1−xCuxCr2Se4 system

Hamedoun, M.; Masrour, R.; Bouslykhane, K.; Hourmatallah, A.; Benzakour, N.

doi:10.1016/j.jmmm.2007.11.023

Cited by 18 publications

(3 citation statements)

References 35 publications

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“…[11] are given in Table 2. The intra-planar and the inter-planar interactions are deduced from the following equations J aa =2J 1 , J ab =4J 1 +8J 2 and J ac =4J 2 [31] and the classical exchange energy for magnetic structure is deduced (see Table 2) by using: EðKÞ=S 2 k B =[6J 1 +12J 2 ] [32] for the ZnCr 2 O 4 system.…”

Section: Discussionmentioning

confidence: 99%

Magnetic properties of MnCr2O4 nanoparticle

Masrour

Hamedoun

Benyoussef

2010

Journal of Magnetism and Magnetic Materials

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Section: Discussionmentioning

confidence: 99%

Magnetic properties of MnCr2O4 nanoparticle

Masrour

Hamedoun

Benyoussef

2010

Journal of Magnetism and Magnetic Materials

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“…[56,57] The tendency for magnetic phenomena resulting from AFM-FM competition was observed in Zn x Fe 1-x Fe 2 O 4, Zn x Cu 1-x Fe 2 O 4 , [11] Zn x Co 1-x Fe 2 O 4 [58] and in a large variety of other spinels. [59][60][61]…”

Section: Exchange Constants Of Zn 28 Se 34 Fementioning

confidence: 99%

Joint Studies of Spin Frustration Induced by Doping Small ZnSe Nanoparticles with Fe Atoms

Gutsev

Bindra

Strouse

et al. 2022

Advanced Physics Research

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As a 1.8 nm ZnSe nanocrystal is progressively doped with 1%, 5%, and 10% Fe, it shows a progressive change in its magnetic properties from a superparamagnetic FM‐dominated exchange type to an onset of AFM exchange with evidence of spin frustration. Magnetization measurements allow to obtain exchange coupling constants that are compared to the results of a Broken‐Symmetry Density Functional Theory (BS‐DFT) model of a doped (ZnSe)34 cluster. DFT shows a capability to reproduce the experimental pattern of the increasing influence of AFM exchange as doping concentration increases. The material phase segregates at the edges where strained rhombic surface sites are the preferred doping sites of iron. Large concentrations of iron leads to the formation of Fe clusters and complex exchange patterns that result in spin frustration in some iron trimers but none in the others. The spin frustration of these complex systems by assuming mirror symmetry of the sites when fitting by using BS‐DFT formalism is classified and analyzed. While some individual J constants obtained have significant errors, the averaged exchange constants are generally in good agreement with our experimental data.

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“…Theoretical studies on magnetic phase diagrams for another system of diluted spinels (Zn 1−x Cu x )[Cr 2 ]Se 4 with 0 ≤ x ≤ 1 were described in [31]. Based on the mean field approximation those authors have shown for Cu concentration x > 0.2 the essential change in nature of magnetic interactions from antiferromagnetic to ferromagnetic.…”

Section: Introductionmentioning

confidence: 99%