z2
-like surface state of Gd(0001) films was investigated. The exchange splitting amounts to 700 meV at 20 K and decreases down to 400 meV at 300 K. Above 300 K the splitting remains constant. Pure spin-mixing as well as pure Stoner-like behavior can therefore be excluded. Instead, the observations are explained by a local spin-polarization due to the atomic 4f-moments which competes with spin-mixing caused by the thermal fluctuations of these moments.
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Received: 25 July 1997/Accepted: 1 October 1997
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Bode, M., Getzlaff, M., Heinze, S. et al. Magnetic exchange splitting of the Gd(0001) surface state studied by variable-temperature scanning tunneling spectroscopy . Appl Phys A 66 (Suppl 1), S121–S124 (1998). https://doi.org/10.1007/s003390051113
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DOI: https://doi.org/10.1007/s003390051113