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

研究成果: Article › 同行評審

11 引文斯高帕斯（Scopus）

摘要

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.

原文	English
文章編號	052504
期刊	Applied Physics Letters
卷	94
發行號	5
DOIs	https://doi.org/10.1063/1.3077312
出版狀態	Published - 2009

All Science Journal Classification (ASJC) codes

物理與天文學（雜項）

存取文件

10.1063/1.3077312

其它文件與鏈接

引用此

@article{e7813c154ea9496baac1bd991467bb15,

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 Publising LLC",

number = "5",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=59849109219&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59849109219&partnerID=8YFLogxK

U2 - 10.1063/1.3077312

DO - 10.1063/1.3077312

M3 - Article

AN - SCOPUS:59849109219

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

摘要

All Science Journal Classification (ASJC) codes

存取文件

其它文件與鏈接

指紋

引用此