Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films

S. Kaji; G. Oomi; S. Mitani; K. Takanashi

doi:10.1016/j.jmmm.2003.12.821

Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films

S. Kaji, G. Oomi, S. Mitani, K. Takanashi

Collaborative Research Center on Energy Materials

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

1 Citation (Scopus)

Abstract

We have measured electrical resistivity and magnetoresistance of Co ₅₂Al₂₀O₂₈ insulating granular film under high pressure. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure. The results suggest a metallic conductivity at high pressure. Furthermore the tunnel magnetoresistance (TMR) is enhanced by more than 2% at 3.1 GPa and 4.2 K, while no enhancement is observed at 77 K and r.t.

Original language	English
Pages (from-to)	1829-1830
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	III
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.821
Publication status	Published - 2004 May

Keywords

Granular material
Pressure effect
Tunnel magnetoresistance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.12.821

Cite this

@article{6ef90205026142bc8ebb383212205c4c,

title = "Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films",

abstract = "We have measured electrical resistivity and magnetoresistance of Co 52Al20O28 insulating granular film under high pressure. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure. The results suggest a metallic conductivity at high pressure. Furthermore the tunnel magnetoresistance (TMR) is enhanced by more than 2% at 3.1 GPa and 4.2 K, while no enhancement is observed at 77 K and r.t.",

keywords = "Granular material, Pressure effect, Tunnel magnetoresistance",

author = "S. Kaji and G. Oomi and S. Mitani and K. Takanashi",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.12.821",

language = "English",

volume = "272-276",

pages = "1829--1830",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "III",

}

TY - JOUR

T1 - Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films

AU - Kaji, S.

AU - Oomi, G.

AU - Mitani, S.

AU - Takanashi, K.

PY - 2004/5

Y1 - 2004/5

N2 - We have measured electrical resistivity and magnetoresistance of Co 52Al20O28 insulating granular film under high pressure. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure. The results suggest a metallic conductivity at high pressure. Furthermore the tunnel magnetoresistance (TMR) is enhanced by more than 2% at 3.1 GPa and 4.2 K, while no enhancement is observed at 77 K and r.t.

AB - We have measured electrical resistivity and magnetoresistance of Co 52Al20O28 insulating granular film under high pressure. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure. The results suggest a metallic conductivity at high pressure. Furthermore the tunnel magnetoresistance (TMR) is enhanced by more than 2% at 3.1 GPa and 4.2 K, while no enhancement is observed at 77 K and r.t.

KW - Granular material

KW - Pressure effect

KW - Tunnel magnetoresistance

UR - http://www.scopus.com/inward/record.url?scp=23044465792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23044465792&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2003.12.821

DO - 10.1016/j.jmmm.2003.12.821

M3 - Article

AN - SCOPUS:23044465792

VL - 272-276

SP - 1829

EP - 1830

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - III

ER -

Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this