Griffiths phase and its evolution with Mn-site disorder in the half-doped manganite Pr0.5Sr0.5Mn1-yGayO3 (y=0.0, 0.025, and 0.05)

被引：182

作者：

Pramanik, A. K. ^{[1
]}

Banerjee, A. ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 02期

关键词：

FERMI-LIQUID BEHAVIOR; RANDOM IMPURITIES; ORDERED STATE; SYSTEMS; FIELD; SUSCEPTIBILITY; SINGULARITIES;

D O I：

10.1103/PhysRevB.81.024431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show Griffiths phase (GP)-like behavior in half-doped Pr0.5Sr0.5MnO3 having ferromagnetic (FM) spin correlation above FM transition (T-C) without any spontaneous magnetization. Temperature range and exponent of GP increase with Ga substitution at Mn site which is not related with structural disorder as Ga does not affect the structure, moreover, reduces Jahn-Teller active Mn3+ ions. FM clusters both above and below T-C reduces their size with Ga. Hence, it is considered that GP originates from phase inhomogeneity and evolves with addition of disorder due to change in its length scale.

引用

页数：5

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