Coexistence of para and ferromagnetic phases of Fe3+ in undoped CdZnTe (Zn ∼ 4%) crystals

被引：0

作者：

Kulkarni, Gururaj Anand ^{[1
]}

Murthy, Oruganty V. S. N. ^{[1
]}

Rao, K. S. R. K. ^{[1
]}

Bhat, S. V. ^{[1
]}

Chakraborty, B. R. ^{[2
]}

机构：

[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[2] Natl Phys Lab, New Delhi 110012, India

来源：

SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 43-44期

关键词：

Semiconductors; Impurities in semiconductors; Phase transitions; Electron paramagnetic resonance; SPIN-RESONANCE ABSORPTION; CDTE; IMPURITIES; METALS;

D O I：

10.1016/j.ssc.2010.09.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The signatures of the coexistence of para and ferromagnetic phases for the Fe3+ charge state of iron have been identified in the low temperature electron spin resonance (ESR) spectra in undoped CdZnTe (Zn similar to 4%) crystals and independently verified by superconducting quantum interference device (SQUID) and AC susceptibility measurements. In the paramagnetic phase the inverse of AC susceptibility follows the Curie-Weiss law. In the ferromagnetic phase the thermal evolution of magnetization follows the well-known Bloch T-3/2 law. This is further supported by the appearance of hysteresis in the SQUID measurements at 2 K below T-c which is expected to lie in between 2 and 2.5 K. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2174 / 2177

页数：4

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