Interplay of Nuclear Magnetism and Superconductivity |
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Authors: | T Herrmannsdörfer S Rehmann M Seibold F Pobell |
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Affiliation: | (1) Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany;(2) Hahn-Meitner-Institut, Glienicker Str. 100, D-14109 Berlin, Germany;(3) Forschungszentrum Rossendrof, D-01314 Dresden, Germany |
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Abstract: | The ratio of nuclear saturation magnetization and superconducting critical field,
0
M
sat
/ B
S0*![equiv](/content/w3810h605k202621/xxlarge8801.gif) , classifies the strength of mutual influence of nuclear magnetism and superconductivity. In order to investigate the interplay of both phenomena for the three distinct cases 1, 1, and 1 we have measured the ac susceptibility of Al, of the intermetallic compound AuIn
2
, and of the metal hydride TiH
2.07
at ultralow temperatures, 17 K T 1 K, as function of static field 0 B 15 mT. For Al, the interplay enables an absolute measurement of the nuclear magnetization. For AuIn
2
, we get a steep decrease of B
S
(T) and a broadening of the superconducting transition in its nuclear ferromagnetic phase. Surprisingly, the nuclear ferromagnetic state coexists with type-I superconductivity in AuIn
2. The metal hydride TiH
2.07
, which is under present investigation, is a good candidate to show reentrant superconductivity. |
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Keywords: | |
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