Correlation between ferromagnetic state and thermally stable layer of Fe on the W(001) surface |
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| Affiliation: | 1. Department of Chemistry, Sookmyung Women''s University, Seoul 140-742, Republic of Korea;2. Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang 790-784, Republic of Korea;3. Center for Nanometrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon 305-340, Republic of Korea |
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| Abstract: | The variations of electronic and magnetic properties of ultrathin Fe overlayers on a W(001) surface as a function of Fe film thickness (1.0–4.0 ML) has been investigated using X-ray magnetic circular dichroism (XMCD) in conjunction with ultraviolet photoelectron spectroscopy (UPS) and low energy electron diffraction (LEED). We found that the ferromagnetic property of Fe film started to build up over 2.0 ML, as we confirmed the spin and angular moment contribution to the magnetic moment using XMCD experiments. We also confirmed that a thermally stable layer is over 2.0 ML of Fe film as we change the annealing temperature taken after Fe deposition at 300 K and at 400 K using UPS. We will systematically demonstrate that the occurrence of ferromagnetic property of Fe film on a W(001) surface is closely correlated to a thermally stable layer of Fe film on a W(001) surface. |
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| Keywords: | XMCD UPS LEED Ferromagnetic state Thermally stable layer |
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