Interfacial defects controlled electrical and magnetotransport in Co/ZnO nanocomposites

C. Y. Hsu; J. C.A. Huang; Y. H. Lee; S. F. Chen; C. P. Liu; S. J. Sun; Yonhua Tzeng

doi:10.1063/1.3077312

Interfacial defects controlled electrical and magnetotransport in Co/ZnO nanocomposites

C. Y. Hsu
, J. C.A. Huang
, Y. H. Lee
, S. F. Chen
, C. P. Liu
, S. J. Sun
, Yonhua Tzeng

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

11 Citations (Scopus)

Abstract

This work demonstrates, by frequency-dependent electrical measurements, significant variation associated with interfacial defects in Co/ZnO nanocomposites (NCs) for electrical and magnetic transport. Radio-frequency impedance measurements showed that heat treatment in an ultrahigh vacuum (UHV) increased interfacial defect density. Interfacial defects-assisted transport reduced the magnetoresistance (MR) ratio from 5.04% for the as-grown sample to 0.17% following heat treatment in UHV. The evolution of the onset frequency of power-law dispersion conductivity revealed that the increase in the interfacial defect density in Co/ZnO NCs upon heat treatment was consistent with the change in MR.

Original language	English
Article number	052504
Journal	Applied Physics Letters
Volume	94
Issue number	5
DOIs	https://doi.org/10.1063/1.3077312
Publication status	Published - 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3077312

Cite this

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title = "Interfacial defects controlled electrical and magnetotransport in Co/ZnO nanocomposites",

abstract = "This work demonstrates, by frequency-dependent electrical measurements, significant variation associated with interfacial defects in Co/ZnO nanocomposites (NCs) for electrical and magnetic transport. Radio-frequency impedance measurements showed that heat treatment in an ultrahigh vacuum (UHV) increased interfacial defect density. Interfacial defects-assisted transport reduced the magnetoresistance (MR) ratio from 5.04\% for the as-grown sample to 0.17\% following heat treatment in UHV. The evolution of the onset frequency of power-law dispersion conductivity revealed that the increase in the interfacial defect density in Co/ZnO NCs upon heat treatment was consistent with the change in MR.",

author = "Hsu, \{C. Y.\} and Huang, \{J. C.A.\} and Lee, \{Y. H.\} and Chen, \{S. F.\} and Liu, \{C. P.\} and Sun, \{S. J.\} and Yonhua Tzeng",

note = "Funding Information: This work has been supported by the National Science Council of Taiwan, ROC, under Grant No. 97-2120-M-006-010 and the Center for Micro-Nano Technology, National Cheng Kung University. ",

year = "2009",

doi = "10.1063/1.3077312",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Inc.",

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TY - JOUR

T1 - Interfacial defects controlled electrical and magnetotransport in Co/ZnO nanocomposites

AU - Hsu, C. Y.

AU - Huang, J. C.A.

AU - Lee, Y. H.

AU - Chen, S. F.

AU - Liu, C. P.

AU - Sun, S. J.

AU - Tzeng, Yonhua

N1 - Funding Information: This work has been supported by the National Science Council of Taiwan, ROC, under Grant No. 97-2120-M-006-010 and the Center for Micro-Nano Technology, National Cheng Kung University.

PY - 2009

Y1 - 2009

N2 - This work demonstrates, by frequency-dependent electrical measurements, significant variation associated with interfacial defects in Co/ZnO nanocomposites (NCs) for electrical and magnetic transport. Radio-frequency impedance measurements showed that heat treatment in an ultrahigh vacuum (UHV) increased interfacial defect density. Interfacial defects-assisted transport reduced the magnetoresistance (MR) ratio from 5.04% for the as-grown sample to 0.17% following heat treatment in UHV. The evolution of the onset frequency of power-law dispersion conductivity revealed that the increase in the interfacial defect density in Co/ZnO NCs upon heat treatment was consistent with the change in MR.

AB - This work demonstrates, by frequency-dependent electrical measurements, significant variation associated with interfacial defects in Co/ZnO nanocomposites (NCs) for electrical and magnetic transport. Radio-frequency impedance measurements showed that heat treatment in an ultrahigh vacuum (UHV) increased interfacial defect density. Interfacial defects-assisted transport reduced the magnetoresistance (MR) ratio from 5.04% for the as-grown sample to 0.17% following heat treatment in UHV. The evolution of the onset frequency of power-law dispersion conductivity revealed that the increase in the interfacial defect density in Co/ZnO NCs upon heat treatment was consistent with the change in MR.

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UR - https://www.scopus.com/pages/publications/59849109219#tab=citedBy

U2 - 10.1063/1.3077312

DO - 10.1063/1.3077312

M3 - Article

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SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

M1 - 052504

ER -

Interfacial defects controlled electrical and magnetotransport in Co/ZnO nanocomposites

Abstract

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