Interface structure and transport of complex oxide junctions

B. B. Nelson-Cheeseman; F. Wong; R. V. Chopdekar; M. Chi; E. Arenholz; N. D. Browning; Y. Suzuki

doi:10.1116/1.2956626

Interface structure and transport of complex oxide junctions

B. B. Nelson-Cheeseman, F. Wong, R. V. Chopdekar, M. Chi, E. Arenholz, N. D. Browning, Y. Suzuki

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

3 Scopus citations

Abstract

The interface structure and magnetism of hybrid magnetic tunnel junction-spin filter devices have been investigated and correlated with their transport properties. Magnetic tunnel junctions made of a spinel Ni Mn2 O4 tunnel barrier sandwiched by theoretically predicted half-metallic electrodes, perovskite La0.7 Sr0.3 Mn O3 and spinel Fe3 O4, exhibit very high crystalline quality as observed by transmission electron microscopy. Structurally abrupt interfaces allow for the distinct magnetic switching of the electrodes as well as large junction magnetoresistance. The change in the magnetic anisotropy observed at the spinel-spinel interface is indicative of a thin interdiffused magnetically soft interfacial layer. The strong exchange coupling at this interface allows for low background magnetoresistance, and a spin-filter effect with when the barrier is ferrimagnetic.

Original language	English
Pages (from-to)	1521-1525
Number of pages	5
Journal	Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume	26
Issue number	4
DOIs	https://doi.org/10.1116/1.2956626
State	Published - 2008
Externally published	Yes

Funding

This work was supported in full by the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Processing was performed in the University of California-Berkeley Microlab. NCEM and ALS are funded by DOE.

Funders	Funder number
U.S. Department of Energy
Basic Energy Sciences

Access to Document

10.1116/1.2956626

Cite this

@article{a1667bcaf37b42df8d9e307374c24516,

title = "Interface structure and transport of complex oxide junctions",

abstract = "The interface structure and magnetism of hybrid magnetic tunnel junction-spin filter devices have been investigated and correlated with their transport properties. Magnetic tunnel junctions made of a spinel Ni Mn2 O4 tunnel barrier sandwiched by theoretically predicted half-metallic electrodes, perovskite La0.7 Sr0.3 Mn O3 and spinel Fe3 O4, exhibit very high crystalline quality as observed by transmission electron microscopy. Structurally abrupt interfaces allow for the distinct magnetic switching of the electrodes as well as large junction magnetoresistance. The change in the magnetic anisotropy observed at the spinel-spinel interface is indicative of a thin interdiffused magnetically soft interfacial layer. The strong exchange coupling at this interface allows for low background magnetoresistance, and a spin-filter effect with when the barrier is ferrimagnetic.",

author = "Nelson-Cheeseman, {B. B.} and F. Wong and Chopdekar, {R. V.} and M. Chi and E. Arenholz and Browning, {N. D.} and Y. Suzuki",

year = "2008",

doi = "10.1116/1.2956626",

language = "English",

volume = "26",

pages = "1521--1525",

journal = "Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures",

issn = "1071-1023",

number = "4",

}

TY - JOUR

T1 - Interface structure and transport of complex oxide junctions

AU - Nelson-Cheeseman, B. B.

AU - Wong, F.

AU - Chopdekar, R. V.

AU - Chi, M.

AU - Arenholz, E.

AU - Browning, N. D.

AU - Suzuki, Y.

PY - 2008

Y1 - 2008

N2 - The interface structure and magnetism of hybrid magnetic tunnel junction-spin filter devices have been investigated and correlated with their transport properties. Magnetic tunnel junctions made of a spinel Ni Mn2 O4 tunnel barrier sandwiched by theoretically predicted half-metallic electrodes, perovskite La0.7 Sr0.3 Mn O3 and spinel Fe3 O4, exhibit very high crystalline quality as observed by transmission electron microscopy. Structurally abrupt interfaces allow for the distinct magnetic switching of the electrodes as well as large junction magnetoresistance. The change in the magnetic anisotropy observed at the spinel-spinel interface is indicative of a thin interdiffused magnetically soft interfacial layer. The strong exchange coupling at this interface allows for low background magnetoresistance, and a spin-filter effect with when the barrier is ferrimagnetic.

AB - The interface structure and magnetism of hybrid magnetic tunnel junction-spin filter devices have been investigated and correlated with their transport properties. Magnetic tunnel junctions made of a spinel Ni Mn2 O4 tunnel barrier sandwiched by theoretically predicted half-metallic electrodes, perovskite La0.7 Sr0.3 Mn O3 and spinel Fe3 O4, exhibit very high crystalline quality as observed by transmission electron microscopy. Structurally abrupt interfaces allow for the distinct magnetic switching of the electrodes as well as large junction magnetoresistance. The change in the magnetic anisotropy observed at the spinel-spinel interface is indicative of a thin interdiffused magnetically soft interfacial layer. The strong exchange coupling at this interface allows for low background magnetoresistance, and a spin-filter effect with when the barrier is ferrimagnetic.

UR - http://www.scopus.com/inward/record.url?scp=49749148742&partnerID=8YFLogxK

U2 - 10.1116/1.2956626

DO - 10.1116/1.2956626

M3 - Article

AN - SCOPUS:49749148742

SN - 1071-1023

VL - 26

SP - 1521

EP - 1525

JO - Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures

JF - Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures

IS - 4

ER -

Interface structure and transport of complex oxide junctions

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this