Effect of heat-treatment on the magnetic and structural properties of perpendicular magnetic anisotropy CoNiReP films produced by electroless deposition

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Abstract

The effect of heat-treatment on the magnetic and structural properties of electroless-plated CoNiReP films with various compositions were studied to determine their microstructure in the as-deposited conditions, as well as to estimate their thermal stability. Due to the difference in compositions, magnetic properties of the films were found to behave differently with heat-treatment. The films with high crystallinity showed larger changes in magnetic properties. The Co32Ni55Re6P7 film with the largest perpendicular magnetic anisotropy energy with treatment up to 500°C. The 〈002〉-oriented hcp structure of this film was also maintained with treatment up to 500°C. However, heat-treatment at 600°C altered the crystal structure of the films from the 〈002〉 oriented hexagonal close-packed structure to face-centered cubic without preferred crystal orientation, causing a sharp change in the magnetic properties of the films. Since the formation of Ni3P compound and fcc regions was detected in the film with treatment higher than 500°C, it was assumed that in the as-deposited films the 〈002〉-oriented hcp crystallites with high crystallinity segregate in the amorphous NiP phase.

Original languageEnglish
Pages (from-to)538-541
Number of pages4
JournalJournal of the Electrochemical Society
Volume138
Issue number2
Publication statusPublished - 1991 Feb

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electroless deposition
Electroless plating
Magnetic anisotropy
Structural properties
Magnetic properties
heat treatment
Heat treatment
magnetic properties
anisotropy
crystallinity
Chemical analysis
Crystallites
Crystal orientation
crystallites
Thermodynamic stability
thermal stability
Crystal structure
microstructure
Microstructure
crystal structure

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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title = "Effect of heat-treatment on the magnetic and structural properties of perpendicular magnetic anisotropy CoNiReP films produced by electroless deposition",
abstract = "The effect of heat-treatment on the magnetic and structural properties of electroless-plated CoNiReP films with various compositions were studied to determine their microstructure in the as-deposited conditions, as well as to estimate their thermal stability. Due to the difference in compositions, magnetic properties of the films were found to behave differently with heat-treatment. The films with high crystallinity showed larger changes in magnetic properties. The Co32Ni55Re6P7 film with the largest perpendicular magnetic anisotropy energy with treatment up to 500°C. The 〈002〉-oriented hcp structure of this film was also maintained with treatment up to 500°C. However, heat-treatment at 600°C altered the crystal structure of the films from the 〈002〉 oriented hexagonal close-packed structure to face-centered cubic without preferred crystal orientation, causing a sharp change in the magnetic properties of the films. Since the formation of Ni3P compound and fcc regions was detected in the film with treatment higher than 500°C, it was assumed that in the as-deposited films the 〈002〉-oriented hcp crystallites with high crystallinity segregate in the amorphous NiP phase.",
author = "Tetsuya Osaka and Takayuki Homma and Katsumi Inoue",
year = "1991",
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T1 - Effect of heat-treatment on the magnetic and structural properties of perpendicular magnetic anisotropy CoNiReP films produced by electroless deposition

AU - Osaka, Tetsuya

AU - Homma, Takayuki

AU - Inoue, Katsumi

PY - 1991/2

Y1 - 1991/2

N2 - The effect of heat-treatment on the magnetic and structural properties of electroless-plated CoNiReP films with various compositions were studied to determine their microstructure in the as-deposited conditions, as well as to estimate their thermal stability. Due to the difference in compositions, magnetic properties of the films were found to behave differently with heat-treatment. The films with high crystallinity showed larger changes in magnetic properties. The Co32Ni55Re6P7 film with the largest perpendicular magnetic anisotropy energy with treatment up to 500°C. The 〈002〉-oriented hcp structure of this film was also maintained with treatment up to 500°C. However, heat-treatment at 600°C altered the crystal structure of the films from the 〈002〉 oriented hexagonal close-packed structure to face-centered cubic without preferred crystal orientation, causing a sharp change in the magnetic properties of the films. Since the formation of Ni3P compound and fcc regions was detected in the film with treatment higher than 500°C, it was assumed that in the as-deposited films the 〈002〉-oriented hcp crystallites with high crystallinity segregate in the amorphous NiP phase.

AB - The effect of heat-treatment on the magnetic and structural properties of electroless-plated CoNiReP films with various compositions were studied to determine their microstructure in the as-deposited conditions, as well as to estimate their thermal stability. Due to the difference in compositions, magnetic properties of the films were found to behave differently with heat-treatment. The films with high crystallinity showed larger changes in magnetic properties. The Co32Ni55Re6P7 film with the largest perpendicular magnetic anisotropy energy with treatment up to 500°C. The 〈002〉-oriented hcp structure of this film was also maintained with treatment up to 500°C. However, heat-treatment at 600°C altered the crystal structure of the films from the 〈002〉 oriented hexagonal close-packed structure to face-centered cubic without preferred crystal orientation, causing a sharp change in the magnetic properties of the films. Since the formation of Ni3P compound and fcc regions was detected in the film with treatment higher than 500°C, it was assumed that in the as-deposited films the 〈002〉-oriented hcp crystallites with high crystallinity segregate in the amorphous NiP phase.

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