Polarized Low-Energy Positrons: A New Probe of Surface Magnetism
- 13 December 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 49 (24), 1779-1783
- https://doi.org/10.1103/physrevlett.49.1779
Abstract
A polarized beam of low-energy positrons has been used for the first time as a probe of surface magnetism. The polarization, , of electrons captured at a Ni(110) surface to form positronium is measured. The temperature dependence of , fitted by a power law, yields an exponent of , in qualitative agreement with calculations of the critical exponent for the surface-layer magnetization. Rapid quenching of the ferromagnetic order is observed for submonolayer coverages of oxygen.
Keywords
This publication has 26 references indexed in Scilit:
- Surface States and the Photoelectron Spin Polarization of Fe(100)Physical Review Letters, 1982
- Surface states, surface magnetization, and electron spin polarization: Fe(001)Physical Review B, 1981
- Electron-Spin Polarization at Single-Crystalline Cr and Ni Surfaces Determined with Electron-Capture SpectroscopyPhysical Review Letters, 1981
- Observation of —100% Spin-Polarized Photoelectrons from a Transversely Magnetized Ni(110) Single CrystalPhysical Review Letters, 1980
- Surface states, surface magnetization, and electron-spin polarization: Ni(001)Physical Review B, 1980
- Self-consistent local-orbital calculation of the surface electronic structure of Ni (100)Physical Review B, 1980
- Spin density in thin Ni (100)-films by the self-consistent LAPW methodJournal of Magnetism and Magnetic Materials, 1980
- Surface Magnetization of Ferromagnetic Ni(110): A Polarized Low-Energy Electron Diffraction ExperimentPhysical Review Letters, 1979
- Energy bands of (100) and (110) ferromagnetic Ni filmsPhysical Review B, 1978
- A review of the theoretical and experimental analyses of electron spin polarization in ferromagnetic transition metals: I. Field emission, photoemission, magneto-optic Kerr effect and tunnelingSurface Science, 1978