Mr. Eskildsen et al., SQUARE TO HEXAGONAL SYMMETRY TRANSITION OF THE FLUX-LINE-LATTICE IN YNI2B2C FOR DIFFERENT FIELD ORIENTATIONS, Physica. B, Condensed matter, 241, 1997, pp. 811-813
Using small-angle neutron scattering we have studied the magnetic flux
line lattice in YNi2B2C with the field rotated 30(:) away from the cr
ystalline c-axis. Previously we have reported on a square to hexagonal
symmetry transition of the fluc line lattice below 1 kOe for H parall
el to c. We find that the rotation of the field shifts the transition
to higher fields in agreement with theoretical prediction. Two differe
nt directions in the ab-plane were chosen as axes of rotation. Rotatin
g the field around [1,1,0] shifts the onset of the transition up to 3
kOe. Rotating the field around [1,0,0] stabilizes the hexagonal Aux li
ne lattice up to the highest measured field of 30 kOe. The difference
between the two axes is also reflected in the Aux line lattice distort
ion. (C) 1998 Elsevier Science B.V. All rights reserved.