The antiferromagnetic and ferrimagnetic properties of iron selenides with NiAs-type structure

Terzieff, P.; Komarek, K. L.

doi:10.1007/bf00913006

Cited by 47 publications

(32 citation statements)

References 23 publications

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“…temperature. This is consistent with a mixture of 3c and 4c superstructures [17]. The magnetization of the crystalline samples, figure 3a) in Section II shows that it probably has the same mixture of superstructures.…”

Section: Acknowledgementssupporting

confidence: 70%

“…We also show in Figure 2 In the magnetization measurements it is expected to find characteristics of both phases present in our crystals. Figure 3 shows the temperature dependence of the magnetization with an applied magnetic field of or has a transition from FM to AF [17]. Fe 7 Se 8 has two types of vacancy superstructures called 3c and 4c.…”

Section: Crystal Growth and Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors

Amigó

Crivillero

Franco

et al. 2017

Supercond. Sci. Technol.

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Abstract. We study the angular dependence of the dissipation in the superconducting state of FeSe and Fe(Se 1-x Tex) through electrical transport measurements, using crystalline intergrown materials. We reveal the key role of the inclusions of the non superconducting magnetic phase Fe 1-y (Se 1-x Tex), growing into the Fe(Se 1-x Tex) pure β-phase, in the development of a correlated defect structure. The matching of both atomic structures defines the growth habit of the crystalline material as well as the correlated planar defects orientation.

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Section: Acknowledgementssupporting

confidence: 70%

Section: Crystal Growth and Characterizationmentioning

confidence: 99%

Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors

Amigó

Crivillero

Franco

et al. 2017

Supercond. Sci. Technol.

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“…Both, Fe 3 Se 4 and Fe 7 Se 8 , are well studied and documented. These iron selenides show, according to literature, a very composition sensitive behaviour with a para-ferrimagnetic transition between 225 K and 460 K as well as a ferri-antiferromagnetic transition between 130 K and 210 K. [18] [19] Although there is yet no investigation of neither the similar compounds Fe 3 Te 4 and Fe 7 Te 8 nor the properties of a Se-Te mixture, our results show a high similarity to the mentioned iron selenides, since the multiple phase transitions are visible at comparable temperatures. Apparently, there is no sign of bulk superconductivity.…”

Section: Resultsmentioning

confidence: 69%

Inhomogeneities and superconductivity in poly-phase Fe-Se-Te systems

Hartwig

Schäfer

Schulze

et al. 2018

Physica B: Condensed Matter

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To study the influence of the sample preparation procedure on the superconducting properties of FeSe x Te 1−x , we have grown two FeSe 0.4 Te 0.6 crystals and investigated their superconducting properties. One of the crystals possessed a secondary phase of Fe 3 Se 2.1 Te 1.8 , while the other was a high-quality FeSe 0.4 Te 0.6 single crystal. We have checked the sample compositions and phases via energy dispersive x-ray spectroscopy to obtain a more sophisticated picture of the inclusions. Our susceptibility measurements under hydrostatic pressure show that neither pressure up to 9 kbar nor stress is sufficient to obtain a superconducting state in the homogeneous crystal. The critical temperature of two-phase FeSe 0.4 Te 0.6 increases at 8.9 kbar from 12.3 K to T c =17.9 K. Therefore, we conclude that inhomogeneities are a necessary feature for providing superconductivity in this iron chalcogenide system. We have prepared Fe 3 Se 2.1 Te 1.8 polycrystals and studied their magnetic properties for comparison.

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“…Therefore, the chiral symmetry breaking effect for the necklace and array systems shown above can be considered as a chiral analogy of the phase transition from the anti-ferromagnetic state to the ferrimagnetic state found in iron selenide 52,53 , and it shows a new possibility to create and design artificial phase-transition effects on demand in metamaterials, without the need of introducing naturally existing phase-change materials.…”

Section: Resultsmentioning

confidence: 99%

Spontaneous chiral symmetry breaking in metamaterials

et al. 2014

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Spontaneous chiral symmetry breaking underpins a variety of areas such as subatomic physics and biochemistry, and leads to an impressive range of fundamental phenomena. Here we show that this prominent effect is now available in artificial electromagnetic systems, enabled by the advent of magnetoelastic metamaterials where a mechanical degree of freedom leads to a rich variety of strong nonlinear effects such as bistability and self-oscillations. We report spontaneous symmetry breaking in torsional chiral magnetoelastic structures where two or more meta-molecules with opposite handedness are electromagnetically coupled, modifying the system stability. Importantly, we show that chiral symmetry breaking can be found in the stationary response of the system, and the effect is successfully demonstrated in a microwave pump-probe experiment. Such symmetry breaking can lead to a giant nonlinear polarization change, energy localization and mode splitting, which provides a new possibility for creating an artificial phase transition in metamaterials, analogous to that in ferrimagnetic domains.

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The antiferromagnetic and ferrimagnetic properties of iron selenides with NiAs-type structure

Cited by 47 publications

References 23 publications

Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors

Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors

Inhomogeneities and superconductivity in poly-phase Fe-Se-Te systems

Spontaneous chiral symmetry breaking in metamaterials

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The antiferromagnetic and ferrimagnetic properties of iron selenides with NiAs-type structure

Cited by 47 publications

References 23 publications

Intrinsic pinning by naturally occurring correlated defects in FeSe1−xTexsuperconductors

Intrinsic pinning by naturally occurring correlated defects in FeSe1−xTexsuperconductors

Inhomogeneities and superconductivity in poly-phase Fe-Se-Te systems

Spontaneous chiral symmetry breaking in metamaterials

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Product

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Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors

Intrinsic pinning by naturally occurring correlated defects in FeSe_1−xTe_xsuperconductors