Browsing by Author "Xing, G."
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Item Ferromagnetic Order at (100) p(1×1) Surfaces of Bulk Paramagnetic Vanadium(American Physical Society, 1986) Rau, C.; Liu, C.; Schmalzbauer, A.; Xing, G.Electron-capture spectroscopy has been used to investigate magnetic order at the topmost atomic layer of atomically clean and flat (100) surfaces of bulk paramagnetic vanadium. From low-energy electron diffraction measurements, we find a p(1×1) surface structure. At 300 K, the long-ranged electron-spin polarization amounts to ∼34%, clearly demonstrating the existence of ferromagnetic order at the V(100) p(1×1) surface. With increasing temperature, the electron-spin polarization decreases almost linearly and disappears at a surface Curie temperature TCs≈540 K.Item Ferromagnetic order at surfaces of ultrathin epitaxial fcc γ-Fe(111)p(11) films on Cu(111)(American Physical Society, 1986) Rau, C.; Schneider, C.; Xing, G.; Jamison, K.Electron-capture spectroscopy has been used to investigate long-ranged and short-ranged two-dimensional magnetic order at free (uncoated) surfaces of homogeneous (island-free), ultrathin fcc γ-Fe(111)(1×1) films pseudomorphically deposited on Cu(111) substrate crystals. At 298 K, the electron-spin polarization at the surface of a four-monolayer thin fcc Fe film amounts to +16%, directly revealing the existence of long-ranged ferromagnetic order. There is evidence that short-ranged ferromagnetic order still exists at 400 K at free surfaces of two and one-monolayer thin fcc Fe films.