Direct Observation of the High Magnetic Field Effect on the Jahn-Teller State in TbVO4.
We report the first direct observation of the influence of high magnetic fields on the Jahn-Teller (JT) transition in TbVO(4). Contrary to spectroscopic and magnetic methods, x-ray diffraction directly measures the JT distortion; the splitting between the (311)/(131) and (202)/(022) pairs of Bragg reflections is proportional to the order parameter. Our experimental results are compared to mean-field calculations, taking into account all possible orientations of the grains relative to the applied field, and qualitative agreement is obtained.
Detlefs
C
C
European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France.
Duc
F
F
Kazeĭ
Z A
ZA
Vanacken
J
J
Frings
P
P
Bras
W
W
Lorenzo
J E
JE
Canfield
P C
PC
Rikken
G L J A
GL