Die magnetischen Eigenschaften der Europium-Chalkogenide unter hydrostatischem Druck

Schwob, P.

doi:10.1007/bf02422676

Cited by 26 publications

(5 citation statements)

References 55 publications

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“…3 we can observe in all our samples the presence of a welldefined magnetic transition at about 11 K. This transition, taking into account the presence of spinodal decompositions with high Eu content, is most probably the paramagnet-antiferromagnet phase transition known for EuTe [10]. The Néel temperature, T N , estimated for our samples equals to 11 K, a value slightly higher than that for EuTe, where T N = 9.58 K [10]. It is therefore highly probable that the Ge 1−x Eu x Te spinodal decompositions with 0.15 < x < 0.35 show antiferromagnetism due to superexchange magnetic interactions.…”

Section: Magnetic Propertiessupporting

confidence: 67%

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

et al. 2018

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We present studies of structural, electrical, and magnetic properties of Ge1−xEuxTe bulk crystals with the chemical composition, x, changing from 0.020 to 0.025. The sample synthesis leads to the formation of EuTe clusters in all our samples. Moreover, the presence of Ge1−xEuxTe spinodal decompositions with broad range of chemical contents is observed even for the sample with x = 0.020. Spinodal decompositions show the antiferromagnetic order with the Néel temperature, TN , equal to about 11 K, close to that for EuTe. The magnetic field dependence of the magnetization, M (B), is characteristic of the presence of magnetic inclusions in the samples.

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Section: Magnetic Propertiessupporting

confidence: 67%

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

et al. 2018

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“…Therefore, we suppose that this transition is related to the presence of EuTe clusters in our samples. The estimated values of the Néel temperature, T N , for the three mentioned samples are close to 11 K, a value slightly higher than that for EuTe bulk crystals with T N =9.58 K [18]. The values of the magnetic susceptibility roughly correspond to the susceptibility due to the chemical amount of Eu in the samples.…”

Section: Magnetic Propertiessupporting

confidence: 49%

Magnetic interactions in Ge_1−xEu_xTe semiconductors: random distribution of magnetic Eu ions versus spinodal decompositions

Kilański

Górska

Khaliq

et al. 2020

Mater. Res. Express

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We present the studies of structural, magnetotransport, and magnetic properties of Ge 1−x Eu x Te bulk crystals with the chemical composition, x, changing from 0.008 to 0.025. For the samples with x>0.015 the sample synthesis leads to formation of Ge 1−x Eu x Te spinodal decompositions with a broad range of chemical contents. The presence of Ge 1−x Eu x Te spinodal decompositions is responsible for the antiferromagnetic order in our samples with x>0.015. For the samples with x<0.015 the structural characterization shows no evidence for clusters, the samples are paramagnetic, but the analysis of the results of magnetic measurements indicates deviations from the random distribution of Eu ions.

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“…This is clearly demonstrated for the sulfide with x = 0.1, which is practically identical to EuS [9]. An opposite behavior is found for the selenide which exhibits a sharp tip as typical for an antiferromagnet (9]. For the sulfide with x = 0.2 we find no clear-cut behavior.…”

Section: Methodsmentioning

confidence: 57%

“…From the initial susceptibility one can determine the type of magnetic ordering and the ordering temperature Tc or TN' Because of the demagnetizing field and the appearance of magnetic domains at Tc a classical ferromagnet will yield a sharp kink at Tc and the initial susceptibility will remain constant below Tc. This is clearly demonstrated for the sulfide with x = 0.1, which is practically identical to EuS [9]. An opposite behavior is found for the selenide which exhibits a sharp tip as typical for an antiferromagnet (9].…”

Section: Methodsmentioning

confidence: 75%

MAGNETIC-AND MAGNETOOPTIC PROPERTIES OF Eu-Sm MONOCHALCOGENIDES

et al. 1987

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We have grown large single crystals of EU1-xsmxS and EU1-xSmxSe for x = 0.1 and 0.2. On thin slabs of the crystals the optical transmission has been measured between 2 K and 300 K. For photon energies less than the absorption edge a line spectrum corresponding only to divalent Sm ions has been observed. In addition the shift of the absorption edge under the influence of temperature and magnetic field-the "red shift"-has been observed. We also measured the magnetic susceptibility in fields of 10 kOe and the initial susceptibility in fields of 10 Oe to determine the effective moment, the magnetic ordering temperatures and the type of magnetic ordering. In addition the core level XPS spectrum has been measured to determine the valency of Sm. It can be asserted, that contrary to statements in the literature, the Sm is in a divalent state.

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Die magnetischen Eigenschaften der Europium-Chalkogenide unter hydrostatischem Druck

Cited by 26 publications

References 55 publications

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

Magnetic interactions in Ge_1−xEu_xTe semiconductors: random distribution of magnetic Eu ions versus spinodal decompositions

MAGNETIC-AND MAGNETOOPTIC PROPERTIES OF Eu-Sm MONOCHALCOGENIDES

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Die magnetischen Eigenschaften der Europium-Chalkogenide unter hydrostatischem Druck

Cited by 26 publications

References 55 publications

Antiferromagnetic EuTe Clusters in Ge1-xEuxTe Semiconductors

Antiferromagnetic EuTe Clusters in Ge1-xEuxTe Semiconductors

Magnetic interactions in Ge1−xEuxTe semiconductors: random distribution of magnetic Eu ions versus spinodal decompositions

MAGNETIC-AND MAGNETOOPTIC PROPERTIES OF Eu-Sm MONOCHALCOGENIDES

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Product

Resources

About

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

Antiferromagnetic EuTe Clusters in Ge_1-xEu_xTe Semiconductors

Magnetic interactions in Ge_1−xEu_xTe semiconductors: random distribution of magnetic Eu ions versus spinodal decompositions