μSR studies of magnetic superconductors based on the BETS molecule
μSR studies of magnetic superconductors based on the BETS molecule
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基于BETS分子的磁超导体μSR研究
DOI：
10.1016/s0277-5387(03)00254-7
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发表时间：
2003
期刊：
影响因子：
2.6
通讯作者：
N. Toyota
中科院分区：
文献类型：
--
作者：
F. Pratt;S. Blundell;I. M. Marshall;T. Lancaster;Stephen Lee;A. Drew;U. Divakar;H. Matsui;N. Toyota
对分子磁性超导体κ-BETS2FeCl4和κ-BETS2FeBr4以及非磁性分子金属κ-BETS2GaCl4和λ-BETS2GaCl4进行了μ子自旋旋转和弛豫测量。在磁性材料中，零场μ子自旋弛豫信号显示静态反铁磁有序态的形成，并且观察到多个进动频率，对应于位于阴离子层内和BETS层内的μ子位点。先前对 FeCl4 盐中弛豫行为的研究表明，其超导转变周围存在显着变化，而 FeBr4 盐在其超导转变区域也显示出类似的变化，其起始温度约为 1.5 K。在非磁性 GaCl4 盐中，观察到超导涡旋晶格的形成，并且穿透深度 λ 来自横向场 μ 子弛豫。当 BETS 超导体与我们已经使用 μSR 研究过的基于 ET 的超导体进行比较时，我们发现 Tcan 和 λ−3 之间存在惊人的相关性。
Muon spin rotation and relaxation measurements have been made on the molecular magnetic superconductors κ-BETS2FeCl4and κ-BETS2FeBr4and the non-magnetic molecular metals κ-BETS2GaCl4and λ-BETS2GaCl4. In the magnetic materials, zero field muon spin relaxation signals show the formation of static antiferromagnetically ordered states and multiple precession frequencies are observed, corresponding to muon sites situated both within the anion layers and within the BETS layers. Studies of the relaxation behavior in the FeCl4salt have previously shown significant changes around its superconducting transition and the FeBr4salt reveals similar changes in the region of its superconducting transition, whose onset is around 1.5 K. In the non-magnetic GaCl4salts the formation of a superconducting vortex lattice was observed and the penetration depth λ was derived from the transverse field muon relaxation. When the BETS superconductors are compared with the ET-based superconductors that we have already studied using μSR, a striking correlation was observed between Tcand λ−3.
影响因子：
15
作者：
Kobayashi, H;Tomita, H;Cassoux, P
通讯作者：
Cassoux, P