[sup 35]Cl nuclear-magnetic-resonance study of magnetic ordering in Sr[sub 2]CuO[sub 2]Cl[sub 2] single crystal
- Dipartimento di Fisica A. Volta,'' Universita di Pavia, 27100 Pavia (Italy)
- Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa (United States)
[sup 35]Cl nuclear-magnetic-resonance (NMR) and relaxation measurements have been performed in a Sr[sub 2]CuO[sub 2]Cl[sub 2] single crystal as a function of orientation between the external magnetic field [bold H][sub 0] and the tetragonal [bold c] axis. The onset is found of an anisotropic inhomogeneous broadening of the NMR line without paramagnetic shift starting below about 320 K. The broadening is strongly temperature dependent and it increases with increasing [bold H][sub 0]. The relaxation rate [ital T][sup [minus]1][sub 1], on the other hand, diverges at [ital T][sub [ital N]][congruent]260 K in agreement with previous results in powder sample. It is suggested that the observed broadening is due to the onset at [ital T][gt][ital T][sub [ital N]] of a spontaneous nonzero thermal average of the Cu[sup 2+] moment lying in the [ital a]-[ital b] plane.
- OSTI ID:
- 7072385
- Journal Information:
- Journal of Applied Physics; (United States), Vol. 75:10; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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360606* - Other Materials- Physical Properties- (1992-)