Structural characterization and temperature dependence of tunnel magnetoresistance in epitaxial Fe/MgO/Fe junctions

S. G. Wang; R. C.C. Ward; G. X. Du; X. F. Han; C. Wang; A. Kohn

doi:10.1109/TMAG.2008.2002402

Structural characterization and temperature dependence of tunnel magnetoresistance in epitaxial Fe/MgO/Fe junctions

S. G. Wang, R. C.C. Ward, G. X. Du, X. F. Han, C. Wang, A. Kohn

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

8 Scopus citations

Abstract

Epitaxial Fe/MgO/Fe magnetic tunnel junctions (MTJs) were grown on MgO(001) substrates by molecular beam epitaxy. The epitaxial structure has been characterized using in-situ reflection high energy diffraction, ex-situ X-ray diffraction, and high-resolution transmission electron microscopy. The magnetic and transport properties have been investigated using vibrating sample magnetometry and physical properties measurement system. The temperature dependence of the TMR ratio, whose value rises from 170% at room temperature to 318% at 10 K, is found to be nonlinear and is fitted using a model based on the effect of magnetic disorder of the electrodes on the spin polarized tunneling.

Original language	English
Pages (from-to)	2562-2565
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	44
Issue number	11 PART 1
DOIs	https://doi.org/10.1109/TMAG.2008.2002402
State	Published - 1 Nov 2008
Externally published	Yes

Keywords

Magnetic disorder
Magnetic tunnel junctions (MTJs)
Molecular beam epitaxy (MBE)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2008.2002402

Cite this

@article{e9411e96c2bb4fd3b1ccf3292dc7ac6c,

title = "Structural characterization and temperature dependence of tunnel magnetoresistance in epitaxial Fe/MgO/Fe junctions",

abstract = "Epitaxial Fe/MgO/Fe magnetic tunnel junctions (MTJs) were grown on MgO(001) substrates by molecular beam epitaxy. The epitaxial structure has been characterized using in-situ reflection high energy diffraction, ex-situ X-ray diffraction, and high-resolution transmission electron microscopy. The magnetic and transport properties have been investigated using vibrating sample magnetometry and physical properties measurement system. The temperature dependence of the TMR ratio, whose value rises from 170% at room temperature to 318% at 10 K, is found to be nonlinear and is fitted using a model based on the effect of magnetic disorder of the electrodes on the spin polarized tunneling.",

keywords = "Magnetic disorder, Magnetic tunnel junctions (MTJs), Molecular beam epitaxy (MBE)",

author = "Wang, {S. G.} and Ward, {R. C.C.} and Du, {G. X.} and Han, {X. F.} and C. Wang and A. Kohn",

year = "2008",

month = nov,

day = "1",

doi = "10.1109/TMAG.2008.2002402",

language = "English",

volume = "44",

pages = "2562--2565",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers",

number = "11 PART 1",

}

TY - JOUR

T1 - Structural characterization and temperature dependence of tunnel magnetoresistance in epitaxial Fe/MgO/Fe junctions

AU - Wang, S. G.

AU - Ward, R. C.C.

AU - Du, G. X.

AU - Han, X. F.

AU - Wang, C.

AU - Kohn, A.

PY - 2008/11/1

Y1 - 2008/11/1

N2 - Epitaxial Fe/MgO/Fe magnetic tunnel junctions (MTJs) were grown on MgO(001) substrates by molecular beam epitaxy. The epitaxial structure has been characterized using in-situ reflection high energy diffraction, ex-situ X-ray diffraction, and high-resolution transmission electron microscopy. The magnetic and transport properties have been investigated using vibrating sample magnetometry and physical properties measurement system. The temperature dependence of the TMR ratio, whose value rises from 170% at room temperature to 318% at 10 K, is found to be nonlinear and is fitted using a model based on the effect of magnetic disorder of the electrodes on the spin polarized tunneling.

AB - Epitaxial Fe/MgO/Fe magnetic tunnel junctions (MTJs) were grown on MgO(001) substrates by molecular beam epitaxy. The epitaxial structure has been characterized using in-situ reflection high energy diffraction, ex-situ X-ray diffraction, and high-resolution transmission electron microscopy. The magnetic and transport properties have been investigated using vibrating sample magnetometry and physical properties measurement system. The temperature dependence of the TMR ratio, whose value rises from 170% at room temperature to 318% at 10 K, is found to be nonlinear and is fitted using a model based on the effect of magnetic disorder of the electrodes on the spin polarized tunneling.

KW - Magnetic disorder

KW - Magnetic tunnel junctions (MTJs)

KW - Molecular beam epitaxy (MBE)

UR - http://www.scopus.com/inward/record.url?scp=67649228861&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2008.2002402

DO - 10.1109/TMAG.2008.2002402

M3 - Article

AN - SCOPUS:67649228861

SN - 0018-9464

VL - 44

SP - 2562

EP - 2565

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 11 PART 1

ER -

Structural characterization and temperature dependence of tunnel magnetoresistance in epitaxial Fe/MgO/Fe junctions

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this