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
收藏
页码：961 / 963
页数：3
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