Ferromagnetism in nanotubes controlled by electron/hole doping
L. Krusin-Elbaum
INTERMAG 2006
We present evidence for forced topological entanglement of line-like vortices in the liquid regime of YBa2Cu3O7−δ with columnar defects. By splaying the defects within a fixed plane (in-fan) we create a c^– axis phase coherent vortex (string) structure which correlates with anisotropic dissipation. The high-field vortex motion is “easy” in fan and “hard” across fan in crystals–a signature of forced entanglement by a small angle splay. The high-field anisotropy is surprisingly reversed in thin films, where forced entanglement is absent. © 1997 American Physical Society.
L. Krusin-Elbaum
INTERMAG 2006
T. Shibauchi, T. Kawakami, et al.
Journal of Magnetism and Magnetic Materials
R.L. Greene, L. Krusin-Elbaum, et al.
Physical Review Letters
T. Shibauchi, L. Krusin-Elbaum, et al.
Physical Review B - CMMP