Low-field positive and high-field negative magneto-resistances in multiphase Fe-oxide thin films at room temperature

Kun Zhao; Jie Xing; Yu Zi Liu; Jian Gao Zhao; Hui Bin Lü

doi:10.1007/s11434-007-0233-x

Low-field positive and high-field negative magneto-resistances in multiphase Fe-oxide thin films at room temperature

Kun Zhao, Jie Xing, Yu Zi Liu, Jian Gao Zhao, Hui Bin Lü

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

1 Scopus citations

Abstract

Multiphase Fe-oxide thin films are fabricated on glass substrates by a facing-target sputtering technique. X-ray diffraction and X-ray photoelectron spectroscopy reveal that Fe, Fe₃O₄, γ-Fe ₂O₃ and FeO coexist in the films. High resolution transmission electron microscopy shows the well-defined columnar grain structure with the unoxidized Fe as the core and iron-oxide as the shell. The low-field positive and high-field negative magnetoresistances coexist in such a system at room temperature, which can be explained by considering a shell/core model. Nonlinear current-voltage curve and photovoltaic effect further confirm the tunneling-type conduction.

Original language	English
Pages (from-to)	1607-1611
Number of pages	5
Journal	Chinese Science Bulletin
Volume	52
Issue number	12
DOIs	https://doi.org/10.1007/s11434-007-0233-x
State	Published - Jun 2007
Externally published	Yes

Funding

Received November 14, 2006; accepted February 13, 2007 doi: 10.1007/s11434-007-0233-x †Corresponding author (email: [email protected]) Supported by the National Natural Science Foundation of China (Grant Nos. 50672132 and 60576015) and the Key Project of Chinese Ministry of Education (Grant No. 107020)

Funders	Funder number
National Natural Science Foundation of China	60576015, 50672132
Ministry of Education of the People's Republic of China	107020

Keywords

Magnetic properties
Magnetoresistance
Thin film

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s11434-007-0233-x

Cite this

@article{59d55772035f44cf87034bf66bf85cdd,

title = "Low-field positive and high-field negative magneto-resistances in multiphase Fe-oxide thin films at room temperature",

abstract = "Multiphase Fe-oxide thin films are fabricated on glass substrates by a facing-target sputtering technique. X-ray diffraction and X-ray photoelectron spectroscopy reveal that Fe, Fe3O4, γ-Fe 2O3 and FeO coexist in the films. High resolution transmission electron microscopy shows the well-defined columnar grain structure with the unoxidized Fe as the core and iron-oxide as the shell. The low-field positive and high-field negative magnetoresistances coexist in such a system at room temperature, which can be explained by considering a shell/core model. Nonlinear current-voltage curve and photovoltaic effect further confirm the tunneling-type conduction.",

keywords = "Magnetic properties, Magnetoresistance, Thin film",

author = "Kun Zhao and Jie Xing and Liu, {Yu Zi} and Zhao, {Jian Gao} and L{\"u}, {Hui Bin}",

year = "2007",

month = jun,

doi = "10.1007/s11434-007-0233-x",

language = "English",

volume = "52",

pages = "1607--1611",

journal = "Chinese Science Bulletin",

issn = "1001-6538",

number = "12",

}

TY - JOUR

T1 - Low-field positive and high-field negative magneto-resistances in multiphase Fe-oxide thin films at room temperature

AU - Zhao, Kun

AU - Xing, Jie

AU - Liu, Yu Zi

AU - Zhao, Jian Gao

AU - Lü, Hui Bin

PY - 2007/6

Y1 - 2007/6

N2 - Multiphase Fe-oxide thin films are fabricated on glass substrates by a facing-target sputtering technique. X-ray diffraction and X-ray photoelectron spectroscopy reveal that Fe, Fe3O4, γ-Fe 2O3 and FeO coexist in the films. High resolution transmission electron microscopy shows the well-defined columnar grain structure with the unoxidized Fe as the core and iron-oxide as the shell. The low-field positive and high-field negative magnetoresistances coexist in such a system at room temperature, which can be explained by considering a shell/core model. Nonlinear current-voltage curve and photovoltaic effect further confirm the tunneling-type conduction.

AB - Multiphase Fe-oxide thin films are fabricated on glass substrates by a facing-target sputtering technique. X-ray diffraction and X-ray photoelectron spectroscopy reveal that Fe, Fe3O4, γ-Fe 2O3 and FeO coexist in the films. High resolution transmission electron microscopy shows the well-defined columnar grain structure with the unoxidized Fe as the core and iron-oxide as the shell. The low-field positive and high-field negative magnetoresistances coexist in such a system at room temperature, which can be explained by considering a shell/core model. Nonlinear current-voltage curve and photovoltaic effect further confirm the tunneling-type conduction.

KW - Magnetic properties

KW - Magnetoresistance

KW - Thin film

UR - http://www.scopus.com/inward/record.url?scp=34547303190&partnerID=8YFLogxK

U2 - 10.1007/s11434-007-0233-x

DO - 10.1007/s11434-007-0233-x

M3 - Article

AN - SCOPUS:34547303190

SN - 1001-6538

VL - 52

SP - 1607

EP - 1611

JO - Chinese Science Bulletin

JF - Chinese Science Bulletin

IS - 12

ER -

Low-field positive and high-field negative magneto-resistances in multiphase Fe-oxide thin films at room temperature

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this