Bulaevskii L N, Hruska M, Maley M P
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2005 Nov 11;95(20):207002. doi: 10.1103/PhysRevLett.95.207002. Epub 2005 Nov 9.
In magnetic superconductors a moving vortex lattice is accompanied by an ac magnetic field which leads to the generation of spin waves. At resonance conditions the dynamics of vortices in magnetic superconductors changes drastically, resulting in strong peaks in the dc I-V characteristics at voltages at which the washboard frequency of the vortex lattice matches the spin wave frequency omegaS(g), where g are the reciprocal vortex lattice vectors. We show that if the washboard frequency lies above the magnetic gap, measurement of the I-V characteristics provides a new method to obtain information on the spectrum of magnetic excitations in borocarbides and cuprate layered magnetic superconductors.
在磁性超导体中，移动的涡旋晶格伴随着一个交流磁场，这会导致自旋波的产生。在共振条件下，磁性超导体中涡旋的动力学发生急剧变化，在直流I-V特性中，当涡旋晶格的搓板频率与自旋波频率ωS(g)（其中g是倒易涡旋晶格矢量）相匹配的电压处会出现强烈的峰值。我们表明，如果搓板频率高于磁隙，I-V特性的测量提供了一种获取硼碳化物和铜酸盐层状磁性超导体中磁激发光谱信息的新方法。
