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Superconductivity in single crystalline YPd2Ge2

机译:单晶YPD2GE2中的超导性

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Single crystals of the YPd2Ge2 compound, crystallizing in the body-centered tetragonal ThCr2Si2-type structure, were studied by means of low-temperature magnetization, specific heat and electrical resistivity measurements. The zero-field data confirmed bulk and intrinsic superconductivity of the compound with the critical temperature 1.14 K, while the experiments performed in magnetic fields revealed a non-trivial character of the superconducting state. In particular, low and close to each other critical fields mu H-0(c1) and mu H-0(c2) (of about 20-30 mT) and field-induced first-order phase transition occurring only in the field parallel to the ab plane suggest possible cross-over from the type-I to type-II/1 superconductivity. Moreover, YPd2Ge2 exhibits robust surface superconductivity with the critical field mu H-0(c3) about 20 times larger than mu H-0(c1) and mu H-0(c2). (C) 2017 Elsevier B.V. All rights reserved.
机译:通过低温磁化,特定的热电电阻率测量,研究了YPD2Ge2化合物的单晶,在体为四边形ThCr2Si2结构中结晶。 零场数据确认了具有临界温度1.14k的化合物的体积和内在的超导性,而在磁场中进行的实验揭示了超导状态的非平凡特征。 特别地,低且靠近彼此关键的临界领域Mu H-0(C1)和MU H-0(C2)(约20-30毫秒)和仅在平行的场中发生的现场引起的一阶相转变 AB平面建议从I型-I型/ 1型超导性交叉。 此外,YPD2GE2具有比mu H-0(C1)和Mu H-0(C2)大约20倍的临界场Mu H-0(C3)的鲁棒表面超导。 (c)2017年Elsevier B.V.保留所有权利。

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