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In this study, we measured spin polarization of electrons field-emitted from a topological antiferromagnetic Cr(001) surface, which is expected to generate a high and stable spin-polarized electron beam. When the Cr thin film deposited on a W<001> tip was thicker than 20 nm, the spin polarization of the field-emitted electrons reached 50%. Furthermore, the magnitude and direction of the spin...
We observed the Verwey transition, metal-insulator transition, in a spin-polarization of field-emitted electrons from a topmost surface of a <110>-oriented magnetite whisker by means of field-emitted electrons polarimetry. The measurements of spin polarization of field-emitted electrons from a magnetite whisker were carried out ranging from 40 to 300 K of tip temperature under UHV condition...
We measured temperature dependence of a spin polarization of field-emitted electrons from a single-crystalline magnetite (Fe 3 O 4 ) whisker with 〈110〉 orientation. The spin polarization of emitted electrons began to increase above 130K corresponding to the temperature of Verwey point (T v ). The increase is considered as reflection of the change of the spin state near the...
We measured spin polarization of electrons field-emitted from half-metallic Co 2 MnSi thin film grown on a W(001) facet via chromium buffer layer using Mott scattering. For spontaneously magnetized samples, values of polarization at room temperature were observed in a range from 10% to 46% and the polarization direction was 〈110〉 orientation of substrate tungsten, which agreed with an easy...
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