Effect of self-organized quantum structures on spinglass and metal-insulator transition in CdMnTe single crystals

被引：0

作者：

Reddy, DR ^{[1
]}

Reddy, KP ^{[1
]}

Rao, NM ^{[1
]}

Reddy, BK ^{[1
]}

机构：

[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 10期

关键词：

ac Susceptibility; CdMnTe; spinglass; photoconductivity; metalinsulator-transition; crystal growth; microstructures;

D O I：

10.1016/j.matiet.2004.12.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Vapour phase grown Cd1-xMnxTe crystals with x=0.2,0.3,0.4 and 0.5 were found to contain self-organized quantum structures as revealed by SEM micrographs. ac Susceptibility measurements were carried out in the temperature range 14-300 K at 313 Hz. Both the real and imaginary parts of susceptibility showed formation of spinglass phase at low temperatures. Dark and photo current studies in the temperature range 125-450 K indicated metal-semiconductor transitions. Further, photo excitation seemed to enhance the metal-semiconductor phase transition temperature. Both the spinglass formation and metal semiconductor transition temperatures observed in the present CdMnTe samples were much higher than the earlier reported values and are attributed to the presence of self-organized microstructures. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：1152 / 1155

页数：4

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