Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes

被引：41

作者：

Chen, Aiping ^{[1
]}

Zhang, Wenrui ^{[1
]}

Khatkatay, Fauzia ^{[1
]}

Su, Qing ^{[1
]}

Tsai, Chen-Fong ^{[1
]}

Chen, Li ^{[1
]}

Jia, Q. X. ^{[2
]}

MacManus-Driscoll, Judith L. ^{[3
]}

Wang, H. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA

[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT, Los Alamos, NM 87545 USA

[3] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 09期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

LOW-FIELD MAGNETORESISTANCE; THIN-FILMS; SYSTEM;

D O I：

10.1063/1.4794899

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A unique quasi-one-dimensionally channeled nanomaze structure has been self-assembled in the (La0.7Sr0.3MnO3)(1-x):(ZnO)(x) vertically aligned nanocomposites (VANs). Significantly enhanced magnetotransport properties have been achieved by tuning the ZnO composition x. The heteroepitaxial VAN thin films, free of large angle grain boundaries, exhibit a maximum low-field magnetoresistance (LFMR) of 75% (20K and 1 T). The enhanced LFMR close to the percolation threshold is attributed to the spin-polarized tunneling through the ferromagnetic/insulating/ferromagnetic vertical sandwiches in the nanomazes. This study suggests that the phase boundary in the nanomaze structure is an alternative approach to produce decoupled ferromagnetic domains and thus to achieve enhanced magnetoresistance. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4794899]

引用

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