Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al2O3(0001) substrates

Yu Shiratsuchi; Yasushi Endo; Masahiko Yamamoto

doi:10.1016/j.tsf.2004.06.039

Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al₂O₃(0001) substrates

Yu Shiratsuchi, Yasushi Endo, Masahiko Yamamoto

ENG - Electrical Engineering

Osaka University

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

12 Citations (Scopus)

Abstract

The magnetic states of 10 ML Fe films grown on inclined Al ₂O₃(0001) substrates were investigated in the transition region of superparamagnetic to ferromagnetic states. The ratio of the superparamagnetic and ferromagnetic components is dependent on both the growth temperature and the inclination of the substrate. The maximum ratio of the ferromagnetic to superparamagnetic was observed in ultrathin Fe films grown on flat substrates at a growth temperature of 473 K. The difference in crystallinity of Fe at each temperature explains the observed behavior. On the other hand, the ratio of ferromagnetic to superparamagnetic components for Fe films grown on inclined substrates behaves in a complex manner with the growth temperature and is also influenced by the uniaxial magnetic anisotropy, which is induced by the inclination of substrate.

Original language	English
Pages (from-to)	141-145
Number of pages	5
Journal	Thin Solid Films
Volume	464-465
DOIs	https://doi.org/10.1016/j.tsf.2004.06.039
Publication status	Published - 2004 Oct

Keywords

AlO
Fe
Ferromagnetism
Inclined substrate
Superparamagnetism

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10.1016/j.tsf.2004.06.039

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title = "Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al2O3(0001) substrates",

abstract = "The magnetic states of 10 ML Fe films grown on inclined Al 2O3(0001) substrates were investigated in the transition region of superparamagnetic to ferromagnetic states. The ratio of the superparamagnetic and ferromagnetic components is dependent on both the growth temperature and the inclination of the substrate. The maximum ratio of the ferromagnetic to superparamagnetic was observed in ultrathin Fe films grown on flat substrates at a growth temperature of 473 K. The difference in crystallinity of Fe at each temperature explains the observed behavior. On the other hand, the ratio of ferromagnetic to superparamagnetic components for Fe films grown on inclined substrates behaves in a complex manner with the growth temperature and is also influenced by the uniaxial magnetic anisotropy, which is induced by the inclination of substrate.",

keywords = "AlO, Fe, Ferromagnetism, Inclined substrate, Superparamagnetism",

author = "Yu Shiratsuchi and Yasushi Endo and Masahiko Yamamoto",

note = "Funding Information: This work is partially supported by a Grant-In-Aid for General Scientific Research (S) and Exploratory Research from the Japanese Ministry of Education, Culture, Sports, Science and Technology. This work is also partially supported by “Priority Assistance of the Formation of Worldwide Renowned Centers of Research—The 21st Century COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design)” from the Japanese Ministry of Education, Sports, Culture, Science and Technology.",

year = "2004",

month = oct,

doi = "10.1016/j.tsf.2004.06.039",

language = "English",

volume = "464-465",

pages = "141--145",

journal = "Thin Solid Films",

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TY - JOUR

T1 - Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al2O3(0001) substrates

AU - Shiratsuchi, Yu

AU - Endo, Yasushi

AU - Yamamoto, Masahiko

N1 - Funding Information: This work is partially supported by a Grant-In-Aid for General Scientific Research (S) and Exploratory Research from the Japanese Ministry of Education, Culture, Sports, Science and Technology. This work is also partially supported by “Priority Assistance of the Formation of Worldwide Renowned Centers of Research—The 21st Century COE Program (Project: Center of Excellence for Advanced Structural and Functional Materials Design)” from the Japanese Ministry of Education, Sports, Culture, Science and Technology.

PY - 2004/10

Y1 - 2004/10

N2 - The magnetic states of 10 ML Fe films grown on inclined Al 2O3(0001) substrates were investigated in the transition region of superparamagnetic to ferromagnetic states. The ratio of the superparamagnetic and ferromagnetic components is dependent on both the growth temperature and the inclination of the substrate. The maximum ratio of the ferromagnetic to superparamagnetic was observed in ultrathin Fe films grown on flat substrates at a growth temperature of 473 K. The difference in crystallinity of Fe at each temperature explains the observed behavior. On the other hand, the ratio of ferromagnetic to superparamagnetic components for Fe films grown on inclined substrates behaves in a complex manner with the growth temperature and is also influenced by the uniaxial magnetic anisotropy, which is induced by the inclination of substrate.

AB - The magnetic states of 10 ML Fe films grown on inclined Al 2O3(0001) substrates were investigated in the transition region of superparamagnetic to ferromagnetic states. The ratio of the superparamagnetic and ferromagnetic components is dependent on both the growth temperature and the inclination of the substrate. The maximum ratio of the ferromagnetic to superparamagnetic was observed in ultrathin Fe films grown on flat substrates at a growth temperature of 473 K. The difference in crystallinity of Fe at each temperature explains the observed behavior. On the other hand, the ratio of ferromagnetic to superparamagnetic components for Fe films grown on inclined substrates behaves in a complex manner with the growth temperature and is also influenced by the uniaxial magnetic anisotropy, which is induced by the inclination of substrate.

KW - AlO

KW - Fe

KW - Ferromagnetism

KW - Inclined substrate

KW - Superparamagnetism

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DO - 10.1016/j.tsf.2004.06.039

M3 - Article

AN - SCOPUS:4544294443

SN - 0040-6090

VL - 464-465

SP - 141

EP - 145

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al₂O₃(0001) substrates

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Keywords

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