Westerholt K, Sprungmann D, Zabel H, Brucas R, Hjörvarsson B, Tikhonov D A, Garifullin I A
Institut für Experimentalphysik/Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
Phys Rev Lett. 2005 Aug 26;95(9):097003. doi: 10.1103/PhysRevLett.95.097003. Epub 2005 Aug 24.
We studied superconducting V layers deposited on an antiferromagnetically coupled Fe(2)V(11) superlattice. The parallel upper critical magnetic field exhibits an anomalous T dependence up to the ferromagnetic saturation field of the superlattice, indicating that the superconducting transition temperature T(S) decreases when rotating the relative sublattice magnetization directions of the superlattice from antiparallel to parallel. This proves that the pair breaking effect of a Fe2 layer is reduced if at a distance of 1.5 nm a second Fe2 layer with antiparallel spin orientation exists.
我们研究了沉积在反铁磁耦合的Fe(2)V(11)超晶格上的超导V层。平行上临界磁场在超晶格的铁磁饱和场之前呈现出反常的T依赖性，这表明当超晶格的相对亚晶格磁化方向从反平行旋转到平行时，超导转变温度T(S)会降低。这证明如果在距离1.5 nm处存在具有反平行自旋取向的第二个Fe2层，Fe2层的对破坏效应会减小。
