A new monoclinic perovskite allotype in Pr0.6Sr0.4MnO3

被引：41
|
作者：
Ritter, C [1 ]
Radaelli, PG [1 ]
Lees, MR [1 ]
Barratt, J [1 ]
Balakrishnan, G [1 ]
Paul, DM [1 ]
机构：
[1] UNIV WARWICK,DEPT PHYS,COVENTRY CV4 7AL,W MIDLANDS,ENGLAND
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 1996年 / 127卷 / 02期
关键词：
D O I：
10.1006/jssc.1996.0384
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We report the observation, in PT0.6Sr0.4MnO3, of a low-temperature phase transition between Pnma and the monoclinic space group I2/a. The I2/a allotype has never previously been observed in the (R(1-x)A(x))MnO3 manganese perovskite system. Furthermore, this space group symmetry is not present in the recently published phase diagram obtained at 30% Mn+4, indicating that electronic doping has a direct effect on the phase stability. The structural and magnetic parameters for the new phase, as obtained from Rietveld refinements of neutron powder diffraction data, are also reported. (C) 1996 Academic Press.
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页码：276 / 282
页数：7
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