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

Aiping Chen; Wenrui Zhang; Fauzia Khatkatay; Qing Su; Chen Fong Tsai; Li Chen; Q. X. Jia; Judith L. Macmanus-Driscoll; H. Wang

doi:10.1063/1.4794899

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

Aiping Chen
, Wenrui Zhang
, Fauzia Khatkatay
, Qing Su
, Chen Fong Tsai
, Li Chen
, Q. X. Jia
, Judith L. Macmanus-Driscoll
, H. Wang

Department of Materials Design and Innovation

Texas A&M University
University of Cambridge

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

A unique quasi-one-dimensionally channeled nanomaze structure has been self-assembled in the (La_0.7Sr_0.3MnO₃) _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 (20 K 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.

Original language	English
Article number	093114
Journal	Applied Physics Letters
Volume	102
Issue number	9
DOIs	https://doi.org/10.1063/1.4794899
State	Published - Mar 4 2013

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title = "Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes",

abstract = "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 (20 K 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.",

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AU - Chen, Aiping

AU - Zhang, Wenrui

AU - Khatkatay, Fauzia

AU - Su, Qing

AU - Tsai, Chen Fong

AU - Chen, Li

AU - Jia, Q. X.

AU - Macmanus-Driscoll, Judith L.

AU - Wang, H.

PY - 2013/3/4

Y1 - 2013/3/4

N2 - 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 (20 K 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.

AB - 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 (20 K 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.

UR - https://www.scopus.com/pages/publications/84875162423

U2 - 10.1063/1.4794899

DO - 10.1063/1.4794899

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SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 093114

ER -

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

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