Spin-dependent tunneling between a soft ferromagnetic layer and hard magnetic nanosize particles

Koichiro Inomata; Hideo Ogiwara; Yoshiaki Saito; Keiichiro Yusu; Katsutaro Ichihara

doi:10.1143/jjap.36.l1380

Spin-dependent tunneling between a soft ferromagnetic layer and hard magnetic nanosize particles

Koichiro Inomata, Hideo Ogiwara, Yoshiaki Saito, Keiichiro Yusu, Katsutaro Ichihara

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

15 Citations (Scopus)

Abstract

Spin-dependent tunneling has been investigated for ferromagnetic tunnel junctions with a new structure, which consists of a hard ferromagnetic insulating granular thin film sandwiched between two soft ferromagnetic layers, or soft ferromagnetic and non-ferromagnetic layers. The granular film, consisting of ferromagnetic Co₈₀Pt₂₀ nanosize particles embedded in a SiO₂ matrix with 13 nm thickness, has a high coercive force. The film was prepared by co-sputtering of Co₈₀Pt₂₀ and SiO₂ targets on a glass substrate with a Cr or a Co₈₀Pt₂₀/Fe underlayer as a bottom electrode. A ferromagnetic Co₉Fe layer as a top electrode was deposited over the granular film to form cross pattern junctions of 0.01 mm² junction area through a metal mask. The tunneling magnetoresistance up to 4.5% at RT was observed for a Co₉Fe/Co₈₀Pt₂₀-SiO₂/Co ₈₀Pt₂₀/Fe junction at a low field.

Original language	English
Pages (from-to)	L1380-L1383
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	36
Issue number	10 SUPPL. B
DOIs	https://doi.org/10.1143/jjap.36.l1380
Publication status	Published - 1997 Oct 15
Externally published	Yes

Keywords

Ferromagnetic
Granular
Hard magnetic
Junction
MR
Tunnel

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy (miscellaneous)
Physics and Astronomy(all)

Access to Document

10.1143/jjap.36.l1380

Fingerprint Dive into the research topics of 'Spin-dependent tunneling between a soft ferromagnetic layer and hard magnetic nanosize particles'. Together they form a unique fingerprint.

Cite this

@article{7a1fdfe964504a0da4d6b899d0e51f70,

title = "Spin-dependent tunneling between a soft ferromagnetic layer and hard magnetic nanosize particles",

abstract = "Spin-dependent tunneling has been investigated for ferromagnetic tunnel junctions with a new structure, which consists of a hard ferromagnetic insulating granular thin film sandwiched between two soft ferromagnetic layers, or soft ferromagnetic and non-ferromagnetic layers. The granular film, consisting of ferromagnetic Co80Pt20 nanosize particles embedded in a SiO2 matrix with 13 nm thickness, has a high coercive force. The film was prepared by co-sputtering of Co80Pt20 and SiO2 targets on a glass substrate with a Cr or a Co80Pt20/Fe underlayer as a bottom electrode. A ferromagnetic Co9Fe layer as a top electrode was deposited over the granular film to form cross pattern junctions of 0.01 mm2 junction area through a metal mask. The tunneling magnetoresistance up to 4.5% at RT was observed for a Co9Fe/Co80Pt20-SiO2/Co 80Pt20/Fe junction at a low field.",

keywords = "Ferromagnetic, Granular, Hard magnetic, Junction, MR, Tunnel",

author = "Koichiro Inomata and Hideo Ogiwara and Yoshiaki Saito and Keiichiro Yusu and Katsutaro Ichihara",

year = "1997",

month = oct,

day = "15",

doi = "10.1143/jjap.36.l1380",

language = "English",

volume = "36",

pages = "L1380--L1383",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "10 SUPPL. B",

}

TY - JOUR

T1 - Spin-dependent tunneling between a soft ferromagnetic layer and hard magnetic nanosize particles

AU - Inomata, Koichiro

AU - Ogiwara, Hideo

AU - Saito, Yoshiaki

AU - Yusu, Keiichiro

AU - Ichihara, Katsutaro

PY - 1997/10/15

Y1 - 1997/10/15

N2 - Spin-dependent tunneling has been investigated for ferromagnetic tunnel junctions with a new structure, which consists of a hard ferromagnetic insulating granular thin film sandwiched between two soft ferromagnetic layers, or soft ferromagnetic and non-ferromagnetic layers. The granular film, consisting of ferromagnetic Co80Pt20 nanosize particles embedded in a SiO2 matrix with 13 nm thickness, has a high coercive force. The film was prepared by co-sputtering of Co80Pt20 and SiO2 targets on a glass substrate with a Cr or a Co80Pt20/Fe underlayer as a bottom electrode. A ferromagnetic Co9Fe layer as a top electrode was deposited over the granular film to form cross pattern junctions of 0.01 mm2 junction area through a metal mask. The tunneling magnetoresistance up to 4.5% at RT was observed for a Co9Fe/Co80Pt20-SiO2/Co 80Pt20/Fe junction at a low field.

AB - Spin-dependent tunneling has been investigated for ferromagnetic tunnel junctions with a new structure, which consists of a hard ferromagnetic insulating granular thin film sandwiched between two soft ferromagnetic layers, or soft ferromagnetic and non-ferromagnetic layers. The granular film, consisting of ferromagnetic Co80Pt20 nanosize particles embedded in a SiO2 matrix with 13 nm thickness, has a high coercive force. The film was prepared by co-sputtering of Co80Pt20 and SiO2 targets on a glass substrate with a Cr or a Co80Pt20/Fe underlayer as a bottom electrode. A ferromagnetic Co9Fe layer as a top electrode was deposited over the granular film to form cross pattern junctions of 0.01 mm2 junction area through a metal mask. The tunneling magnetoresistance up to 4.5% at RT was observed for a Co9Fe/Co80Pt20-SiO2/Co 80Pt20/Fe junction at a low field.

KW - Ferromagnetic

KW - Granular

KW - Hard magnetic

KW - Junction

KW - MR

KW - Tunnel

UR - http://www.scopus.com/inward/record.url?scp=0031249064&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031249064&partnerID=8YFLogxK

U2 - 10.1143/jjap.36.l1380

DO - 10.1143/jjap.36.l1380

M3 - Article

AN - SCOPUS:0031249064

VL - 36

SP - L1380-L1383

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 10 SUPPL. B

ER -