title: Surface magnetization measurement with a spin-polarized metastable He beam under high magnetic fields of 0-5 T.
abstract: An apparatus for measuring the surface magnetization with a spin-polarized metastable helium atom (He(*)) beam under external magnetic fields of 0-5 T was developed. The He(*) beam, spin polarized by a sextupole magnet, was directed to the sample placed in the bore of 5 T superconducting magnet. A zero-field spin flipper was used for switching the polarity of beam polarization. A Stern-Gerlach analysis indicated the beam polarization of nearly 100% and the spin flipping efficiency of >90%. A surface magnetization curve was successfully measured from 0 to 5 T for an FeCu(100) surface.
authors.affiliation: National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Kurahashi
authors.forename: Shiro
authors.initials: S
authors.lastname: Entani
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yamauchi