THE EFFECT OF THE HEAT-TREATMENTS ON THE ANTIFERROMAGNETISM IN LA2CUO4-DELTA SINGLE-CRYSTALS

被引:110
作者
YAMADA, K [1 ]
KUDO, E [1 ]
ENDOH, Y [1 ]
HIDAKA, Y [1 ]
ODA, M [1 ]
SUZUKI, M [1 ]
MURAKAMI, T [1 ]
机构
[1] NIPPON TELEGRAPH & TEL PUBL CORP, ELECT COMMUN LABS, 162 TOKAI, IBARAKI 31911, JAPAN
关键词
CRYSTALS - Heat Treatment - LANTHANUM COMPOUNDS - Thermal Effects - NEUTRONS - Diffraction;
D O I
10.1016/0038-1098(87)90693-4
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Neutron diffraction and magnetic susceptibility measurements revealed antiferromagnetic order in single crystals of La//2CuO//4 where both sublattice moments (M//s/Cu) and Neel temperatures (T//N) strongly depend on heat treatments. Deoxidization enhances M//s and T//N (M//s equals 0. 6 plus or minus 0. 05 mu //B: T//N equals 298 plus or minus 5K), whereas oxidization reduces these values (M//s equals 0. 22 plus or minus 0. 04 mu //B:T//N equals 135 plus or minus 20K) from those of as-grown crystal (M//s equals 0. 38 plus or minus 0. 05 mu //B:T//N equals 230 plus or minus 10K). A broad peak in the temperature dependence of magnetic susceptibility near T//N with the field paralell to the c-axis (a less than b less than c) is also enhanced in deoxidized crystal.
引用
收藏
页码:753 / 756
页数:4
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