Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111)

Kun Jen Hsueh, Cheng Jui Tsai, Shih Yu Wu, Hsin Lei Chou, Francesco Bisio, Chien Cheng Kuo, Wen-Chin Lin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Following the cyclic heating in oxygen and annealing, an oxygen-induced 3 × 3 reconstruction was found on the W(111) surface. The growth, crystalline structure, thermal stability, and magnetism of Co ultrathin films deposited on the O-3 × 3/W(111) surface were investigated. The Auger signal of the oxygen was always observable and nearly invariant after either Co deposition or annealing, indicating the role of the surfactant played by oxygen. Auger electron spectroscopy and scanning tunneling microscopy measurements revealed the 2-dimensional growth of Co on O-3 × 3/W(111). Following the annealing procedures, the surfactant oxygen was always observed to float on the film surface while the Co film transformed to 3-dimensional islands with a wetting layer. In contrast to the thermodynamically stable wetting layer of 1 physical monolayer (PML) Co on clean W(111) between 700 and 1000 K, the oxygen surfactant led to a reduction of the wetting layer to ≈1/3 PML after thermal annealing. The 6 and 9.6 PML Co/O-3 × 3/W(111) revealed a stable in-plane magnetic anisotropy. A 6-fold symmetry corresponding to the crystalline structure was observed in the in-plane angle-dependent magneto-optical Kerr effect measurement.

Original languageEnglish
Article number203907
JournalJournal of Applied Physics
Volume114
Issue number20
DOIs
Publication statusPublished - 2013 Nov 28

Fingerprint

drying
surfactants
oxygen
wetting
annealing
floats
Kerr effects
Auger spectroscopy
electron spectroscopy
scanning tunneling microscopy
thermal stability
anisotropy
heating
symmetry

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Hsueh, K. J., Tsai, C. J., Wu, S. Y., Chou, H. L., Bisio, F., Kuo, C. C., & Lin, W-C. (2013). Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111). Journal of Applied Physics, 114(20), [203907]. https://doi.org/10.1063/1.4833570

Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111). / Hsueh, Kun Jen; Tsai, Cheng Jui; Wu, Shih Yu; Chou, Hsin Lei; Bisio, Francesco; Kuo, Chien Cheng; Lin, Wen-Chin.

In: Journal of Applied Physics, Vol. 114, No. 20, 203907, 28.11.2013.

Research output: Contribution to journalArticle

Hsueh, Kun Jen ; Tsai, Cheng Jui ; Wu, Shih Yu ; Chou, Hsin Lei ; Bisio, Francesco ; Kuo, Chien Cheng ; Lin, Wen-Chin. / Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111). In: Journal of Applied Physics. 2013 ; Vol. 114, No. 20.
@article{46aeed868a2349618222a254eb461bbc,
title = "Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111)",
abstract = "Following the cyclic heating in oxygen and annealing, an oxygen-induced 3 × 3 reconstruction was found on the W(111) surface. The growth, crystalline structure, thermal stability, and magnetism of Co ultrathin films deposited on the O-3 × 3/W(111) surface were investigated. The Auger signal of the oxygen was always observable and nearly invariant after either Co deposition or annealing, indicating the role of the surfactant played by oxygen. Auger electron spectroscopy and scanning tunneling microscopy measurements revealed the 2-dimensional growth of Co on O-3 × 3/W(111). Following the annealing procedures, the surfactant oxygen was always observed to float on the film surface while the Co film transformed to 3-dimensional islands with a wetting layer. In contrast to the thermodynamically stable wetting layer of 1 physical monolayer (PML) Co on clean W(111) between 700 and 1000 K, the oxygen surfactant led to a reduction of the wetting layer to ≈1/3 PML after thermal annealing. The 6 and 9.6 PML Co/O-3 × 3/W(111) revealed a stable in-plane magnetic anisotropy. A 6-fold symmetry corresponding to the crystalline structure was observed in the in-plane angle-dependent magneto-optical Kerr effect measurement.",
author = "Hsueh, {Kun Jen} and Tsai, {Cheng Jui} and Wu, {Shih Yu} and Chou, {Hsin Lei} and Francesco Bisio and Kuo, {Chien Cheng} and Wen-Chin Lin",
year = "2013",
month = "11",
day = "28",
doi = "10.1063/1.4833570",
language = "English",
volume = "114",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "20",

}

TY - JOUR

T1 - Oxygen surfactant-assisted growth and dewetting of Co films on O-3 × 3/W(111)

AU - Hsueh, Kun Jen

AU - Tsai, Cheng Jui

AU - Wu, Shih Yu

AU - Chou, Hsin Lei

AU - Bisio, Francesco

AU - Kuo, Chien Cheng

AU - Lin, Wen-Chin

PY - 2013/11/28

Y1 - 2013/11/28

N2 - Following the cyclic heating in oxygen and annealing, an oxygen-induced 3 × 3 reconstruction was found on the W(111) surface. The growth, crystalline structure, thermal stability, and magnetism of Co ultrathin films deposited on the O-3 × 3/W(111) surface were investigated. The Auger signal of the oxygen was always observable and nearly invariant after either Co deposition or annealing, indicating the role of the surfactant played by oxygen. Auger electron spectroscopy and scanning tunneling microscopy measurements revealed the 2-dimensional growth of Co on O-3 × 3/W(111). Following the annealing procedures, the surfactant oxygen was always observed to float on the film surface while the Co film transformed to 3-dimensional islands with a wetting layer. In contrast to the thermodynamically stable wetting layer of 1 physical monolayer (PML) Co on clean W(111) between 700 and 1000 K, the oxygen surfactant led to a reduction of the wetting layer to ≈1/3 PML after thermal annealing. The 6 and 9.6 PML Co/O-3 × 3/W(111) revealed a stable in-plane magnetic anisotropy. A 6-fold symmetry corresponding to the crystalline structure was observed in the in-plane angle-dependent magneto-optical Kerr effect measurement.

AB - Following the cyclic heating in oxygen and annealing, an oxygen-induced 3 × 3 reconstruction was found on the W(111) surface. The growth, crystalline structure, thermal stability, and magnetism of Co ultrathin films deposited on the O-3 × 3/W(111) surface were investigated. The Auger signal of the oxygen was always observable and nearly invariant after either Co deposition or annealing, indicating the role of the surfactant played by oxygen. Auger electron spectroscopy and scanning tunneling microscopy measurements revealed the 2-dimensional growth of Co on O-3 × 3/W(111). Following the annealing procedures, the surfactant oxygen was always observed to float on the film surface while the Co film transformed to 3-dimensional islands with a wetting layer. In contrast to the thermodynamically stable wetting layer of 1 physical monolayer (PML) Co on clean W(111) between 700 and 1000 K, the oxygen surfactant led to a reduction of the wetting layer to ≈1/3 PML after thermal annealing. The 6 and 9.6 PML Co/O-3 × 3/W(111) revealed a stable in-plane magnetic anisotropy. A 6-fold symmetry corresponding to the crystalline structure was observed in the in-plane angle-dependent magneto-optical Kerr effect measurement.

UR - http://www.scopus.com/inward/record.url?scp=84888602387&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84888602387&partnerID=8YFLogxK

U2 - 10.1063/1.4833570

DO - 10.1063/1.4833570

M3 - Article

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 20

M1 - 203907

ER -