2015 Fiscal Year Final Research Report
Spin-polarized surface states and elucidation of the mechanism of appearance of ferromagnetism in 4d transition metal ultrathin films and nano-particles
| Project/Area Number |
25390080
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | Osaka Kyoiku University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 走査型トンネル顕微鏡 / Pd薄膜 / 強磁性発現機構 / 表面準位 |
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| Outline of Final Research Achievements |
In this research, we studied surface nanostructure, local density of states, and magnetism of ultrathin Pd films by scanning tunneling microscope/spectroscopy (STM/STS), low energy low-energy electron diffraction (LEED) to verify experimentally the origin of the appearance of ferromagnetism in ultrathin Pd films.
High quality epitaxial Pd(001) films, consisting of atomically flat terraces, were successfully grown by using the UHV system equipped with MBE and STM. The dI/dV spectra of the 4ML thick of Pd(001) film shows a distinct peak at +250 mV, which may correspond to the spin-polarized surface states of Pd(001) surface. We have studied the Pd thickness dependence of lattice constants by the LEED patterns, and they turns out that the Pd(001) films show lattice expiations.
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| Free Research Field |
表面磁性、表面・界面物性、スピントロニクス、磁性物理
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