Indications of phase separation in polycrystalline La1-xSrxMnO3 for x ≈ 0.5

被引:43
作者
Patil, SI
Bhagat, SM
Shu, QQ
Lofland, SE
Ogale, SB
Smolyaninova, VN
Zhang, X
Palmer, BS
Decca, RS
Brown, FA
Drew, HD
Greene, RL
Troyanchuk, IO
McCarroll, WH
机构
[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[2] Natl Acad Sci Belarus, Inst Solid State Phys, Minsk 220072, BELARUS
[3] Rider Univ, Dept Chem & Biochem, Lawrenceville, NJ 08648 USA
关键词
D O I
10.1103/PhysRevB.62.9548
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present systematic studies of polycrystalline La1-xSrxMnO3 where x is varied from 0.46 to 0.53 at 0.01 intervals. We have measured the magnetic resonance, ac susceptibility, de magnetization, x-ray diffraction, four-probe resistivity, and optical reflectivity. The data seem to indicate that, at low T, the materials are intimate mixtures of ferromagnetic and antiferromagnetic microregions. For x > 0.48 we observe anomalies pointing toward charge ordering on lowering T. An effective-medium theory is presented, and an appropriate phase diagram is proposed.
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页码:9548 / 9554
页数:7
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