Ag-related alloy formation and magnetic phases for Ag/Co/Ir(111) ultrathin films

Tsay, Jyh-Jong; Tsai, Der‐Chong; Chang, Cheng Hsun Tony; Chen, Wei Hsiang

doi:10.1016/j.tsf.2013.09.051

Thin Solid Films

2013

DOI: 10.1016/j.tsf.2013.09.051

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Ag-related alloy formation and magnetic phases for Ag/Co/Ir(111) ultrathin films

Jyh-Jong Tsay

Der‐Chong Tsai

Cheng Hsun Tony Chang

et al.

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2015

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“…The various components are described in detail elsewhere. 6,19,20 A series of experiments at elevated temperatures for 3 ML Fe/Ir(111) have been performed. The specimen is annealed at the indicated temperature for 10 min and then is cooled to ambient temperature to carry out AES and LEED measurements.…”

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Layered structure and related magnetic properties for annealed Fe/Ir(111) ultrathin films

Jiang

Chen

Hsieh

et al. 2015

Journal of Applied Physics

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After annealing treatments for fcc-Fe/Ir(111) below 600 K, the surface layers remain pseudomorphic. The Ir(111) substrate plays an important role on the expanded Fe lattice. At temperatures between 750 and 800 K, the surface composition shows a stable state and a c(2 × 4) structure is observed. We discover a layered structure composed of some Fe atoms on the top of a Fe0.5Ir0.5 interfacial alloy supported on the Ir(111) substrate. The competition between the negative formation heat of Fe0.5Ir0.5 and surface free energy of Fe causes the formation of layered structure. The existence of ferromagnetic dead layer coincides with the formation of fcc-Fe for ultrathin Fe on Fe0.5Ir0.5/Ir(111). For Fe films thicker than three monolayers, the linear increase of the Kerr intensity versus the Fe coverage is related to the growing of bcc-Fe on the surface where the Fe layer is incoherent to the underlying Fe0.5Ir0.5/Ir(111). These results emphasize the importance of the substrate induced strain and layered structure of Fe/Fe0.5Ir0.5/Ir(111) on the magnetic properties and provide valuable information for future applications.

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confidence: 99%

“…In depth profiling experiments, the sputtering rate R of the adsorbate can be evaluated. 20,22 After sputtering for t minutes, the intensity of the Fe Auger signal I Fe which is proportional to the percentage of residual Fe atoms can be expresses as…”

mentioning

confidence: 99%

Layered structure and related magnetic properties for annealed Fe/Ir(111) ultrathin films

Jiang

Chen

Hsieh

et al. 2015

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

show abstract

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Ag-related alloy formation and magnetic phases for Ag/Co/Ir(111) ultrathin films

Cited by 1 publication

References 30 publications

Layered structure and related magnetic properties for annealed Fe/Ir(111) ultrathin films

Layered structure and related magnetic properties for annealed Fe/Ir(111) ultrathin films

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