Title :
Magnetic properties of Ho measured by a scanning SQUID microscope
Author :
Gudoshnikov, S.A. ; Kalabukhov, A.S. ; Chupakhin, S.A. ; Tishin, A.M. ; Snigirev, O.V. ; Bohr, J. ; Muck, M. ; Heiden, C. ; Dechert, J.
Author_Institution :
Inst. of Terrestrial Magnetism, Ionosphere & Radiowave Propagation, Acad. of Sci., Troitsk, Russia
fDate :
6/1/1999 12:00:00 AM
Abstract :
We have applied a dc SQUID based microscope to study surface magnetization of a Ho single crystal at 77 K in parallel (up to 0.4 kA/m) and perpendicular (up to 0.1 kA/m) magnetic fields. Magnetization curves and the topographic maps of the magnetic field distribution near the polished surface [0001] of the crystals have been recorded with a spatial resolution better than 50 /spl mu/m. Qualitative evidence for ferromagnetic ordering at the [0001] surface have been found.
Keywords :
SQUID magnetometers; holmium; magnetisation; microscopy; surface magnetism; Ho; Ho single crystal; ferromagnetic ordering; magnetic field distribution; magnetic properties; scanning SQUID microscopy; surface magnetization; topographic mapping; Coils; Magnetic force microscopy; Magnetic properties; Magnetic sensors; Perpendicular magnetic recording; Physics; SQUIDs; Substrates; Surface topography; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
