Enhanced blocking temperature in NiO spin valves: Role of cubic spinel ferrite layer between pinned layer and NiO

R. F C Farrow, M. J. Carey, R. F. Marks, P. M. Rice, David Smith

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We compare the blocking temperature for simple permalloy (80% Ni)/Au/permalloy/NiO spin valves with and without an interfacial, oxidized Fe layer (Fe layer 12 Å thick) inserted at the permalloy/NiO interface. We find a significantly increased blocking temperature and pinning field for spin valves with the interfacial Fe-oxide layer, as a result of moderate (230 °C/1 h) annealing of the Au/permalloy/Fe-oxide/NiO part of the spin valve. High resolution transmission electron microscopy and electron energy loss microanalysis reveal that the Fe-oxide layer is converted to a cubic spinel ferrite (Ni0.8Fe2.2O4) layer by solid state reaction with the NiO.

Original languageEnglish (US)
Pages (from-to)1191-1193
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number8
StatePublished - Aug 21 2000

Fingerprint

spinel
Permalloys (trademark)
ferrites
oxides
temperature
microanalysis
temperature distribution
energy dissipation
electron energy
solid state
transmission electron microscopy
annealing
high resolution
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Enhanced blocking temperature in NiO spin valves : Role of cubic spinel ferrite layer between pinned layer and NiO. / Farrow, R. F C; Carey, M. J.; Marks, R. F.; Rice, P. M.; Smith, David.

In: Applied Physics Letters, Vol. 77, No. 8, 21.08.2000, p. 1191-1193.

Research output: Contribution to journalArticle

Farrow, R. F C ; Carey, M. J. ; Marks, R. F. ; Rice, P. M. ; Smith, David. / Enhanced blocking temperature in NiO spin valves : Role of cubic spinel ferrite layer between pinned layer and NiO. In: Applied Physics Letters. 2000 ; Vol. 77, No. 8. pp. 1191-1193.
@article{999005a5b3614339b2dbe1f0c62414e2,
title = "Enhanced blocking temperature in NiO spin valves: Role of cubic spinel ferrite layer between pinned layer and NiO",
abstract = "We compare the blocking temperature for simple permalloy (80{\%} Ni)/Au/permalloy/NiO spin valves with and without an interfacial, oxidized Fe layer (Fe layer 12 {\AA} thick) inserted at the permalloy/NiO interface. We find a significantly increased blocking temperature and pinning field for spin valves with the interfacial Fe-oxide layer, as a result of moderate (230 °C/1 h) annealing of the Au/permalloy/Fe-oxide/NiO part of the spin valve. High resolution transmission electron microscopy and electron energy loss microanalysis reveal that the Fe-oxide layer is converted to a cubic spinel ferrite (Ni0.8Fe2.2O4) layer by solid state reaction with the NiO.",
author = "Farrow, {R. F C} and Carey, {M. J.} and Marks, {R. F.} and Rice, {P. M.} and David Smith",
year = "2000",
month = "8",
day = "21",
language = "English (US)",
volume = "77",
pages = "1191--1193",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "8",

}

TY - JOUR

T1 - Enhanced blocking temperature in NiO spin valves

T2 - Role of cubic spinel ferrite layer between pinned layer and NiO

AU - Farrow, R. F C

AU - Carey, M. J.

AU - Marks, R. F.

AU - Rice, P. M.

AU - Smith, David

PY - 2000/8/21

Y1 - 2000/8/21

N2 - We compare the blocking temperature for simple permalloy (80% Ni)/Au/permalloy/NiO spin valves with and without an interfacial, oxidized Fe layer (Fe layer 12 Å thick) inserted at the permalloy/NiO interface. We find a significantly increased blocking temperature and pinning field for spin valves with the interfacial Fe-oxide layer, as a result of moderate (230 °C/1 h) annealing of the Au/permalloy/Fe-oxide/NiO part of the spin valve. High resolution transmission electron microscopy and electron energy loss microanalysis reveal that the Fe-oxide layer is converted to a cubic spinel ferrite (Ni0.8Fe2.2O4) layer by solid state reaction with the NiO.

AB - We compare the blocking temperature for simple permalloy (80% Ni)/Au/permalloy/NiO spin valves with and without an interfacial, oxidized Fe layer (Fe layer 12 Å thick) inserted at the permalloy/NiO interface. We find a significantly increased blocking temperature and pinning field for spin valves with the interfacial Fe-oxide layer, as a result of moderate (230 °C/1 h) annealing of the Au/permalloy/Fe-oxide/NiO part of the spin valve. High resolution transmission electron microscopy and electron energy loss microanalysis reveal that the Fe-oxide layer is converted to a cubic spinel ferrite (Ni0.8Fe2.2O4) layer by solid state reaction with the NiO.

UR - http://www.scopus.com/inward/record.url?scp=0006906237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0006906237&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0006906237

VL - 77

SP - 1191

EP - 1193

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 8

ER -