Exchange-biasing mechanism in La2/3Ca1/3MnO3/La1/3Ca2/3MnO3 multilayers

被引：61

作者：

Panagiotopoulos, I ^{[1
]}

Christides, C

Pissas, M

Niarchos, D

机构：

[1] Natl Ctr Sci Res Demokritos, Inst Mat Sci, Athens 15310, Greece

[2] Univ Patras, Dept Engn Sci, Sch Engn, GR-26110 Patras, Greece

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.60.485

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of [La2/3Ca1/3MnO3(Lambda/2)/La1/3Ca2/3MnO3(Lambda/2)](15) multilayers, with bilayer thicknesses Lambda between 2 and 32 nm, has been prepared by pulsed laser deposition. The study of their magnetic and magnetotransport properties reveals the presence of an exchange-biasing mechanism at low temperatures. Zero-field-cooling and field-cooling magnetic measurements reveal a blocking temperature :around 70 K that is independent from the bilayer thickness, whereas the average film magnetization becomes zero at 250 K. It is observed that the exchange-biasing field H-EB at 10 K follows the variation of coercive field H-c with Lambda, indicating that there is a significant contribution in H-c from the exchange anisotropy at the interfaces. The optimum exchange-biasing properties were observed in multilayers with Lambda = 8 nm. [S0163-1829(99)04525-7].

引用

页码：485 / 491

页数：7

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