The Superconductivity in Re–B System

Kawano, A.; Mizuta, Yukiko; Takagiwa, Hiroyuki; Muranaka, Toshiya; Akimitsu, Jun

doi:10.1143/jpsj.72.1724

Cited by 45 publications

(40 citation statements)

References 7 publications

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“…Therefore, superconductivity in 231Re is due to phase Re 3 B for which it was reported in ref. [22] a T c =4.65K. XRD data show that samples 231Z consist mainly of…”

Section: Annealing Of LI 2 Pd 3 B Samplesmentioning

confidence: 99%

Discovery of Li2(Pd,Pt)3B superconductors

Badica

Togano

Takeya

et al. 2007

Physica C: Superconductivity and its Applications

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Critical temperature T c of the Li 2 (Pd 1-x Pt x ) 3 B was reported to be 7-8K for x=0 and 2.2-2.8K for x=1. In this article we present our preliminary results on behavior of magnetization-temperature curves with starting composition of Pd-B precursor, y-Li concentration in Li y Pd 3 B and postannealing of the Pd-end compound. Results suggest that to maximize T c ratio Pd:B should be close to 3:1, while y-Li has to be optimum. The lowest T c for Li y Pd 3 B was 4.4-4.6K, while postannealings at 560°C allowed enhancement of T c up to 8.2-8.4K. Compositions Li 2 Z 3 B with Z=Ni, Ru, Rh, Re, Ag are not superconducting down to 1.8K. Exception is composition with Re showing superconductivity due to Re 3 B compound. All samples were prepared by arc melting.

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“…Therefore, superconductivity in 231Re is due to phase Re 3 B for which it was reported in ref. [22] a T c =4.65K. XRD data show that samples 231Z consist mainly of…”

Section: Annealing Of LI 2 Pd 3 B Samplesmentioning

confidence: 99%

Discovery of Li2(Pd,Pt)3B superconductors

Badica

Togano

Takeya

et al. 2007

Physica C: Superconductivity and its Applications

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show abstract

“…Values of H c1 were taken as the field for which the M͑H͒ curve starts to deviate from the linear behavior generated by perfect diamagnetism [ Fig. 11 From H c1 ͑0͒ and , the penetration depth can be calculated to be = 194 nm, by the formula H c1 = ͑⌽ 0 /4 2 ͒ln͑/͒. Data are plotted versus temperature in the inset of Fig.…”

mentioning

confidence: 99%

Magnetization measurements on Li2Pd3B superconductor

Badica¹,

Kondo²,

Kudo³

et al. 2004

Applied Physics Letters

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Magnetization in dc magnetic fields and at different temperatures has been measured on the antiperovskite Li2Pd3B with a cubic structure composed of distorted Pd6B octahedrons. This material was recently found to exhibit superconductivity at 7–8K. The critical fields Hc1(0) and Hc2(0) are determined to be 135Oe and 4T, respectively. Critical current density, scaling of the pinning force within the Kramer model, and irreversibility field data are presented. Several superconductivity parameters were deduced: Coherence length ξ=9.1nm, penetration depth λ=194nm, and Ginzburg–Landau parameter κ=21. The material resembles other boride superconductors from the investigated points of view.

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“…While our finding that Re 7 B 3 is extremely incompressible is very robust, the associated error is quite large. However, Re 7 B 3 can also be obtained by arc melting [22] and hence it is now worthwhile to synthesize and check a phase pure sample at ambient pressure, and then pressurize this sample in order to corroborate our findings and increase the precision of the bulk modulus.…”

Section: Discussionmentioning

confidence: 59%

“…In contrast, the other two binary phases that have been observed in the ReeB system, namely Re 3 B and Re 7 B 3 have attracted much less attention [20,21]. Kawano et al [22] reported the superconductivity of Re 7 B 3 (T c ¼ 3.3 K) and Re 3 B (T c ¼ 4.8 K), while Takagiwa et al [23] reported the magnetic properties of Re 3 B. Phase stabilities at high-(p, T) conditions are currently unknown in the ReeB system and the compressibilities of Re 3 B and Re 7 B 3 have not been determined yet.…”

Section: Q1mentioning

confidence: 99%