Title :
Verwey transition in field-emitted electrons from <110>-oriented magnetite whisker
Author :
Nagai, Shigekazu ; Hata, Koichi ; Okada, Morihiro ; Mimura, Hidenori
Author_Institution :
Grad. Sch. of Eng., Mie Univ., Tsu, Japan
Abstract :
Magnetite Fe<sub>2</sub>O<sub>3</sub> whiskers are synthesized by thermal oxidation of a stainless steel substrate and identified as a single crystal extending in <110> direction by transmission electron microscopy. Field emission microscope (FEM) equipped with Mott polarization analyzer under pressure of 2times10-8 Pa are carried out to confirm the origin of Verwey transition by investigating tip temperature and voltage dependence of spin polarisation of the field-emitted electrons.
Keywords :
electron field emission; field emission electron microscopy; magnesium compounds; metal-insulator transition; spin polarised electron emission; transmission electron microscopy; whiskers (crystal); <110>-oriented magnetite whisker; FEM; Fe2O3; Mott polarization analysis; Verwey transition; field emission microscopy; field-emitted electrons; single crystal; spin polarisation; stainless steel substrate; thermal oxidation; tip temperature; transmission electron microscopy; Electron emission; Electron microscopy; Magnetic analysis; Magnetic force microscopy; Oxidation; Polarization; Steel; Temperature dependence; Transmission electron microscopy; Voltage;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2009. IVNC 2009. 22nd International
Conference_Location :
Shizuoka
Print_ISBN :
978-1-4244-3587-6
Electronic_ISBN :
978-1-4244-3588-3
DOI :
10.1109/IVNC.2009.5271835
