Thermal relaxation of field-induced irreversible ferromagnetic phase in Pr-doped manganites

被引：49

作者：

Dho, JG ^{[1
]}

Hur, NH ^{[1
]}

机构：

[1] Korea Res Inst Stand & Sci, Ctr CMR Mat, Taejon 305600, South Korea

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.67.214414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the magnetic and transport properties of Pr0.65Ca0.35MnO3 and Pr0.82Na0.18MnO3 with almost the same doping level under various magnetic fields. Upon applying a field of 4 T, both compounds undergo a metamagnetic transition from antiferromagnetic (AFM) to ferromagnetic (FM) in the low-temperature region. The field-induced FM state is very stable for at least 10(5) s even after removing the field. This irreversible FM behavior is different from the spontaneous FM ordering as well as the FM state in a reversible metamagnetic transition. We discuss this unusual FM phenomenon found in the Pr-doped manganites with the AFM ground state in terms of the reorientation of Mn spins pinned by localized Pr moments.

引用

页数：6

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