2011
DOI: 10.1016/j.physc.2011.05.088
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Intrinsic pinning properties of FeSe0.5Te0.5

Abstract: The intrinsic pinning properties of FeSe 0.5 Te 0.5 , which is the superconductor with T c of about 14 K, were studied by the analysis of magnetization curves by the extended critical state model. In the magnetization measurements by SQUID magnetometer, the external magnetic fields were applied parallel and perpendicular to c-axis of the sample.The critical current density J c 's under the perpendicular field of 1 T were estimated by using the Kimishima model as about 1.6 × 10 4 , 8.8 × 10 3 , 4.1 × 10 3 , and… Show more

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Cited by 10 publications
(6 citation statements)
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“…3a-f. The images of FeTe 1−x Se x show layer-like grain of the samples in accordance to previous findings [27,28]. The shape of the grains became more plate-like as the Se concentration increased.…”
Section: Resultssupporting
confidence: 91%
“…3a-f. The images of FeTe 1−x Se x show layer-like grain of the samples in accordance to previous findings [27,28]. The shape of the grains became more plate-like as the Se concentration increased.…”
Section: Resultssupporting
confidence: 91%
“…It can be seen that polycrystalline FTS-2 sample has mainly a ferromagnetic background due to ferromagnetic nature of Fe, which yields more dominant ferromagnetic signal than the diamagnetic signal. In general, this indicates the absence of bulk superconductivity in the samples, as obtained by the other research groups [35][36][37][38][39][40][41]. The lower critical field (H c1 ) is an important superconducting parameter where the magnetic field starts to penetrate in to the sample and accordingly vortexes consist of on the sample surface as expected.…”
Section: The Activation Energy Calculationssupporting
confidence: 70%
“…These phases are mainly antiferromagnetic hexagonal FeTe 0.5 Se 0.5 phase (marked with H) and unreacted Fe element (marked as asterisks). We did not detect common impurity phases such as, FeSe 2 , Fe 7 Se 8 and δ-FeSe and also oxide peaks as obtained in previous works by other groups [27,37,38]. The main peaks are indexed as tetragonal FeTe 0.5 Se 0.5 superconducting phase with a space group of P4/nmm, Lattice parameters and unit cell volume of the samples prepared were calculated to be a=3.7885(5) Å, c=5.9453(5) Å and 85.03 Å 3 respectively.…”
Section: Methodssupporting
confidence: 39%
“…Finally, annealed at 400 -500 • C in a period of one day. R-X diffraction patterns gave the crystalline structure as the reported by [9,[11][12][13][14][15][16][17].…”
Section: A Compound and Junctions Characteristicssupporting
confidence: 67%
“…The characteristics were measured from 1.7 to 25 K. Results show the size of the energy gap, the gap evolution with temperature, and ratio 2∆/K B T C . The compound characteristics were determined by resistivity, ρ -T, specific heat, C P − T , and magnetization, M − T , accordingly to transport and magnetic measurements the transition temperature was T C = 14.5 K, as shown by other researchers [6,7,11,12].…”
Section: A Compound and Junctions Characteristicsmentioning
confidence: 73%