Anisotropy of ESR absorption of single crystals of R-Ba-Cu-0 superconductors (region of weak magnetic fields)
Vesnin Yu. I. , Istomin V. E., Kostsov E. G.
In R-Ba-Cu-O single crystals at Τ = 77-92 К, a low-field ESR absorption is possible only for certain orientations of the plane of the crystal with respect to the directions of the static magnetic field Η = and the alternating magnetic field. This absorption reaches a maximum when the Caxis of the crystal makes a 45° angle with Η = .