Activation Energy of Interdiffiision and Interface Structure for CoFc/Cu Spin-valves

A. T. Saito; I. L. Iwasaki; Y. Kamiguchi; Fuke; M. Sahashi

doi:10.1109/20.706568

Activation Energy of Interdiffiision and Interface Structure for CoFc/Cu Spin-valves

A. T. Saito, I. L. Iwasaki, Y. Kamiguchi, Fuke, M. Sahashi

ENG - Electronic Engineering

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

16 Citations (Scopus)

Abstract

Annealing time and temperature dependences of MR ratio in CoFe/Cu spin-valves were investigated. Thermal deterioration of MR ratio was well explained by considering two phenomena with effective activation energies of 2.16 eV and 1.57 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/FeMn spin-valves, and considering one phenomenon with a value of 2.49 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valves, respectively. These values are in good agreement with activation energies of interdiffusion based on the vacancy mechanism. It is shown that no significant change in MR ratio is evaluated from the effective activation energies for the period of more than 10 years at 150°C in CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valve films.

Original language	English
Pages (from-to)	1420-1422
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	34
Issue number	4 PART 1
DOIs	https://doi.org/10.1109/20.706568
Publication status	Published - 1998 Dec 1

Keywords

Activation energy
Cofe/cu spin-valve
Interdiffusion
Thermal stability
Vacancy mechanism

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Activation Energy of Interdiffiision and Interface Structure for CoFc/Cu Spin-valves",

abstract = "Annealing time and temperature dependences of MR ratio in CoFe/Cu spin-valves were investigated. Thermal deterioration of MR ratio was well explained by considering two phenomena with effective activation energies of 2.16 eV and 1.57 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/FeMn spin-valves, and considering one phenomenon with a value of 2.49 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valves, respectively. These values are in good agreement with activation energies of interdiffusion based on the vacancy mechanism. It is shown that no significant change in MR ratio is evaluated from the effective activation energies for the period of more than 10 years at 150°C in CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valve films.",

keywords = "Activation energy, Cofe/cu spin-valve, Interdiffusion, Thermal stability, Vacancy mechanism",

author = "Saito, {A. T.} and Iwasaki, {I. L.} and Y. Kamiguchi and Fuke and M. Sahashi",

year = "1998",

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doi = "10.1109/20.706568",

language = "English",

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T1 - Activation Energy of Interdiffiision and Interface Structure for CoFc/Cu Spin-valves

AU - Saito, A. T.

AU - Iwasaki, I. L.

AU - Kamiguchi, Y.

AU - Fuke,

AU - Sahashi, M.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - Annealing time and temperature dependences of MR ratio in CoFe/Cu spin-valves were investigated. Thermal deterioration of MR ratio was well explained by considering two phenomena with effective activation energies of 2.16 eV and 1.57 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/FeMn spin-valves, and considering one phenomenon with a value of 2.49 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valves, respectively. These values are in good agreement with activation energies of interdiffusion based on the vacancy mechanism. It is shown that no significant change in MR ratio is evaluated from the effective activation energies for the period of more than 10 years at 150°C in CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valve films.

AB - Annealing time and temperature dependences of MR ratio in CoFe/Cu spin-valves were investigated. Thermal deterioration of MR ratio was well explained by considering two phenomena with effective activation energies of 2.16 eV and 1.57 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/FeMn spin-valves, and considering one phenomenon with a value of 2.49 eV for CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valves, respectively. These values are in good agreement with activation energies of interdiffusion based on the vacancy mechanism. It is shown that no significant change in MR ratio is evaluated from the effective activation energies for the period of more than 10 years at 150°C in CoZrNb/NiFe/CoFe/Cu/CoFe/IrMn spin-valve films.

KW - Activation energy

KW - Cofe/cu spin-valve

KW - Interdiffusion

KW - Thermal stability

KW - Vacancy mechanism

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EP - 1422

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 4 PART 1

ER -

Activation Energy of Interdiffiision and Interface Structure for CoFc/Cu Spin-valves

Abstract

Keywords

ASJC Scopus subject areas

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