A FIRST-ORDER PHASE-TRANSITION INDUCED BY A MAGNETIC-FIELD

被引：902

作者：

KUWAHARA, H

TOMIOKA, Y

ASAMITSU, A

MORITOMO, Y

TOKURA, Y

机构：

[1] JOINT RES CTR ATOM TECHNOL, TSUKUBA, IBARAKI 305, JAPAN

[2] UNIV TOKYO, DEPT APPL PHYS, TOKYO 113, JAPAN

来源：

SCIENCE | 1995年 / 270卷 / 5238期

关键词：

D O I：

10.1126/science.270.5238.961

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An electronic (metal-to-insulator) phase transition of the first order, which can be caused by an external magnetic field, was discovered in Nd1/2Sr1/2MnO3. A clear hysteresis was observed during the increase and decrease of an external magnetic field at a fixed temperature. The hysteretic field region was observed to depend critically on temperature and to drastically expand with a decrease of temperature, perhaps as a result of suppression of the effect of thermal fluctuations on the first-order phase transition. Although it has seldom been observed, this is thought to be a generic feature of the first-order phase transition at low temperatures near 0 kelvin.

引用

页码：961 / 963

页数：3

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