Magnetic phase transition and electronic anomalies in La{sub 1.96{minus}x}Y{sub 0.04}Sr{sub x}CuO{sub 4} around x{approximately}1/8
La-NMR, Hall coefficient and sound velocity have been measured in order to investigate the correlation between the magnetic ordering, the prominent change of transport properties, the suppression of {Tc} and the structural transformation around x{approximately}1/8 in La{sub 1.96{minus}x}Y{sub 0.04}Sr{sub x}CuO{sub 4}. by the substitution of 0.04/2 Y for La-sites, the structural transformation to the low temperature tetragonal phase (LTT) is caused at 57{+-}14 K for samples around x{approximately}0.115. The prominent decrease of the Hall coefficient followed by the sign reversal and the magnetic ordering are observed around x{approximately}0.115 below temperatures T{sub s} and T{sub N}, respectively. T{sub s} vs x shows a bell shaped curve with the maximum value of 65 K at x{approximately}0.115 where most prominent suppression of {Tc} appears. T{sub N} shows similar x dependence to T{sub s} with the maximum value of 40 K at x{approximately}0.115. The change of the electronic state below T{sub s} and the suppression of {Tc} become more prominent and the magnetic ordering is observed more wide range of x under the LTT phase.
- Research Organization:
- Tohoku Univ., Sendai (JP)
- OSTI ID:
- 20012838
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 3-4; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS'99, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Nov 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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