Synthesis of high-quality FeSe0.5Te0.5 polycrystal using an easy one-step technique

Li, Xiong; Shi, Xintong; Wang, Jiaping; Zhang, Yufeng; Zhuang, Jincheng; Yuan, Feifei; Shi, Zhixiang

doi:10.1016/j.jallcom.2015.05.034

Cited by 30 publications

(23 citation statements)

References 36 publications

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“…Both results indicate good superconducting properties with the critical temperature T c values of 14.9 K and 14.1 K, respectively, as marked on the images. The values are comparable to the reported values and can be recognized as a reasonable value for Fe x Se 0.5 Te 0.5 polycrystalline materials [24][25][26] . Therefore, it can be concluded that the sintering process at 700 °C for 12 h with a slow cooling process is effective for the fabrication of β-Fe(Se, Te) superconductors.…”

Section: Resultssupporting

confidence: 90%

The phase evolution mechanism in Fe(Se, Te) system

Liu¹,

Li²,

Zhang³

et al. 2016

Physica C: Superconductivity and its Applications

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Section: Resultssupporting

confidence: 90%

The phase evolution mechanism in Fe(Se, Te) system

Liu¹,

Li²,

Zhang³

et al. 2016

Physica C: Superconductivity and its Applications

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“…3 displays an enlarged view of the M-T curve of the as-drawn wire, and a T c of ∼ 13 K of its core is obtained. Besides, the T c of ∼ 13 K of the core of the as-drawn wire is close to the literature [4,10,12,14]. However, the values of T c of the Nb sheathand the core are largely decreased after heat treatment, with the superconducting transition of the core of even covered by the one of Nb sheath.…”

Section: Resultssupporting

confidence: 85%

“…The FeSe 0.5 Te 0.5 precursor was prepared by the melting technique reported elsewhere [12]. Besides, in the fabrications of Sr-122 and Sm-1111 wires, Ag powder was added into the precursor to improve the grains connectivity, which results in the increase of the transport J c [30].…”

Section: Methodsmentioning

confidence: 99%

“…Among the iron-based superconductors family, the FeSe composing of only ironchalcogenide layers holds the simplest crystal structure, which gives a favor for probing the mechanism of superconductivity of the iron-based superconductors [8]. Although the initial superconducting temperature (T c ) in FeSe is just 8 K, it can be increased to 36.7 K under a high pressure of 8.9 GPa and 14 K by doping appropriate Te [9][10][11][12][13][14]. After the intercalation of alkali metals, T c can reach ∼ 32 K [15], and can be further increased to ∼ 48 K by employing high pressure [16].…”

mentioning

confidence: 99%

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Fabrication of FeSe 0 . 5 Te 0 . 5 Superconducting Wires by an Ex Situ Powder-in-Tube Method

Liu

Zhang

et al. 2016

J Supercond Nov Magn

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We report the fabrication of Cu/Nb-sheathed FeSe 0.5 Te 0.5 superconducting wires by an ex situ powderin-tube method. After swaging and drawing, the as-drawn wires were heat-treated at different heat conditions. Subsequently, characterizations and transport critical current measurements were performed on the heat-treated FeSe 0.5 Te 0.5 wires. Also, the results of the as-drawn wire are presented for comparison. The FeSe 0.5 Te 0.5 cores reacted with the Nb sheaths when heat-treated at a high temperature or at a low temperature for a long time. Furthermore, according to our results, the highest transport critical current density (J c ) at 0.5 and 0.75 T is about 1.6 × 10 4 and 1.5 × 10 3 A/cm 2 , respectively.

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“…The rotational symmetry of the resonator is preserved by covering the square sample with a thin metal mask having a circular hole in it. The sample has T c ≃ 18 K and a normal state resistivity [21], in good agreement with the values in similar samples [20], [22] or other single/polycrystals of similar composition [23], [24].…”

Section: Methodssupporting

confidence: 84%

Pinning, flux flow resistivity and anisotropy of Fe(Se,Te) thin films from microwave measurements through a bitonal dielectric resonator

Pompeo¹,

Alimenti²,

Torokhtii³

et al. 2020

Preprint

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We report on the anisotropy of the vortex motion surface impedance of a FeSexTe1−x thin film grown on a CaF2 substrate. The dependence on the magnetic field intensity up to 1.2 T and direction, both parallel and perpendicular to the sample c-axis, was explored at fixed temperature at two distinct frequencies, ∼ 16 GHz and ∼ 27 GHz, by means of bitonal dielectric resonator. The free flux flow resistivity ρ ff was obtained by exploiting standard models for the high frequency dynamics, whereas the angle dependence was studied in the framework of the well known and widely used Blatter-Geshkenbein-Larkin (BGL) scaling theory for anistropic superconductors. Excellent agreement with the scaling law prescription by the fluxon flux flow resistivity was obtained. From the scaling analysis, a lowfield mass anisotropy ∼ 1.8 was obtained, well within the value ranges reported in literature. The angular dependence of the pinning constant suggests that pinning is dominated by random, isotropic point pins, consistently with critical current density measurements.

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Synthesis of high-quality FeSe0.5Te0.5 polycrystal using an easy one-step technique

Cited by 30 publications

References 36 publications

The phase evolution mechanism in Fe(Se, Te) system

The phase evolution mechanism in Fe(Se, Te) system

Fabrication of FeSe 0 . 5 Te 0 . 5 Superconducting Wires by an Ex Situ Powder-in-Tube Method

Pinning, flux flow resistivity and anisotropy of Fe(Se,Te) thin films from microwave measurements through a bitonal dielectric resonator

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