Evidence for ferromagnetic order at gadolinium surfaces above the bulk Curie temperature | Zendy

C. Rau | Zendy; S. Eichner | Zendy

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Evidence for ferromagnetic order at gadolinium surfaces above the bulk Curie temperature

Author(s) -

C. Rau,

S. Eichner

Publication year - 1986

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.34.6347

Subject(s) - curie temperature , gadolinium , condensed matter physics , materials science , ferromagnetism , curie , anisotropy , curie constant , electron , curie–weiss law , nuclear magnetic resonance , physics , optics , nuclear physics , metallurgy

The electron-spin polarization P at the topmost layer of atomically clean, magnetized gadolinium (Gd) surfaces is measured by using electron capture spectroscopy. P varies almost linearly with temperature between 160 K (P=-42%) and 315 K (P=0). It is found that the surface Curie temperature TCs is far above—lying near 310 K—the bulk Curie temperature TCb=292.5 K, indicating uniaxial anisotropic magnetic exchange interactions at the topmost surface layer of Gd

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