Adsorbate influence on the coercive field of ultrathin Co/Cu{110}

Gunn, David S. D.; Küpper, D.; Jenkins, Stephen J.; Bland, J. A. C.

doi:10.1016/j.susc.2009.01.036

Cited by 7 publications

(1 citation statement)

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“…There has been extensive research on chemisorption dependent magnetism in thin film surfaces for various materials in many groups, including Fe/W(110), 8,9) Co/W(110), 8,9) Ni(111), 10) Fe/MgO(100), 11,12) Fe/Ag(100), 12) Fe/W(100), 13) Co/ Pt(111), 14) CoPt alloy, 15) and Co/Cu(110). 16) Low oxygen exposure leads to chemisorbed oxygen which shows a magnetic coupling with the magnetized film. 8,9) For high oxygen exposures, the formation of nonmagnetic oxides results in the disappearance of asymmetry of majority and minority state components.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Tsay

Chen

2010

Jpn. J. Appl. Phys.

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During oxygen exposure to ultrathin Co/Ir(111) films, both the oxidative process and physical adsorption occur. The diffusion length of oxygen is around two monolayers of Co. Within this thickness, Co films are almost oxidative and ferromagnetism disappears. For thicker films with nanometer thickness, after completing the oxidative process at the beginning of oxygen exposure, the physical adsorption becomes a major process. By controlling the amount of further exposure to oxygen, the coercive force in the polar configuration can be adjusted while keeping the Kerr rotation at a nearly constant value.

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Section: Introductionmentioning

confidence: 99%

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Tsay

Chen

2010

Jpn. J. Appl. Phys.

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Single‐Crystalline Dodecahedral and Octodecahedralα‐Fe₂O₃ Particles Synthesized by a Fluoride Anion–Assisted Hydrothermal Method

Liu

Tian

et al. 2010

Adv Funct Materials

180

164

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Microcalorimetry of oxygen adsorption on fcc Co{110}

Liao

Fiorin

Jenkins

et al. 2012

Phys. Chem. Chem. Phys.

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The coverage dependent heats of adsorption and sticking probabilities for oxygen on fcc Co{110} have been measured at 300 K using single crystal adsorption calorimetry (SCAC). Initial adsorption is consistent with dissociative chemisorption at low coverage followed by oxide formation above 0.6 ML coverage. The initial heat of adsorption of 633 kJ mol(-1) is similar to heat values calorimetrically measured on other ferromagnetic metal surfaces, such as nickel and iron. As the coverage increases, the heat of adsorption and sticking probability drop very rapidly up to the onset of oxidation. As already observed for other oxygen-metal surface systems, strong lateral adatom repulsions are responsible for the transition from the chemisorption regime to oxide film formation at higher coverage. The heat of oxide formation at the onset is 475 kJ mol(-1), which is consistent with the formation of CoO crystallites. The oxide film formation is discussed in terms of nucleation and island growth, and the Mott-Cabrera mechanisms, the latter being evidenced by the relatively constant heat of adsorption and sticking probability in contrast to the nickel and iron oxidation cases.

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Adsorbate influence on the coercive field of ultrathin Co/Cu{110}

Cited by 7 publications

References 34 publications

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Single‐Crystalline Dodecahedral and Octodecahedralα‐Fe₂O₃ Particles Synthesized by a Fluoride Anion–Assisted Hydrothermal Method

Microcalorimetry of oxygen adsorption on fcc Co{110}

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Adsorbate influence on the coercive field of ultrathin Co/Cu{110}

Cited by 7 publications

References 34 publications

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Oxygen Adsorption and Magnetic Properties of Ultrathin Co/Ir(111) Films

Single‐Crystalline Dodecahedral and Octodecahedralα‐Fe2O3 Particles Synthesized by a Fluoride Anion–Assisted Hydrothermal Method

Microcalorimetry of oxygen adsorption on fcc Co{110}

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Single‐Crystalline Dodecahedral and Octodecahedralα‐Fe₂O₃ Particles Synthesized by a Fluoride Anion–Assisted Hydrothermal Method