arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0901.0268cond-mat.supr-concond-mat.str-el
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BaFe2-xNixAs2(x = 0,1,2)单晶的结构和各向异性

Structure and Anisotropic Properties of BaFe2-xNixAs2 (x = 0, 1, 2) Single Crystals

Athena S. Sefat, Rongying Jin, Michael A. McGuire, Brian C. Sales, David Mandrus, Filip Ronning, E. D. Bauer, Yurij Mozharivskyj

摘要:

本文报道了BaFe_2As_2、BaNi_2As_2和BaFeNiAs_2单晶的晶体结构、各向异性电阻率和磁化率以及比热的测量结果。BaFe_2As_2的性质证明了C(T)、Fisher的d(XT)/dT和dp/dT结果在确定TN = 132(1)K的反铁磁转变时的等价性。BaNi_2As_2在T_0 = 131 K时发生了从高温四斜相到低温三斜(P-1)相的结构相变,其超导临界温度远低于T_0,T_c = 0.69 K。BaFeNiAs 2在0.4 K时没有表现出任何超导性,其性质类似于BaCo 2As 2,一种重正化顺磁金属。

英文摘要:

The crystal structure, anisotropic electrical resistivity and magnetic susceptibility, as well as specific heat results from single crystals of BaFe2As2, BaNi2As2, and BaFeNiAs2 are surveyed. BaFe2As2 properties demonstrate the equivalence of C(T), Fisher's d(XT)/dT, and dp/dT results in determining the antiferromagnetic transition at TN = 132(1) K. BaNi2As2 shows a structural phase transition from a high-temperature tetragonal phase to a low-temperature triclinic (P-1) phase at T0 = 131 K.The superconducting critical temperature for BaNi2As2 is well below T0 and at Tc = 0.69 K. BaFeNiAs2 does not show any sign of superconductivity to 0.4 K and exhibits properties similar to BaCo2As2, a renormalized paramagnetic metal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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