Title :
A dc SQUID-based magnetic microscope study of the magnetic properties of the Ni thin films
Author :
Gudoshnikov, S.A. ; Ukhansky, N.N. ; Vengrus, I.I. ; Andreev, K.E. ; Tishin, A.M. ; Snigirev, O.V.
Author_Institution :
Inst. of Terrestrial Magnetism, Ionosphere & Radiowave Propagation, Acad. of Sci., Troitsk, Russia
fDate :
6/1/1997 12:00:00 AM
Abstract :
We have applied a developed HTS dc SQUID based magnetic microscope for study of the magnetic properties of ultrathin Ni films. A magnetic moment sensitivity close to 10/sup -15/ A.m/sup 2//Hz/sup 1/2/ has been obtained at 77 K. The space resolution was determined at level of 100 /spl mu/m by the separation between the SQUID and the studied film surface. One-domain structure, in-plane orientation of magnetic moment and ferromagnetic-like ordering in 26 /spl Aring/ thick film were found. An absolute value of the film magnetic moment has been estimated.
Keywords :
SQUIDs; ferromagnetic materials; magnetic domains; magnetic moments; magnetic thin films; magnetic variables measurement; microscopy; nickel; 77 K; HTS DC SQUID; Ni; Ni ultrathin film; domain structure; ferromagnetic ordering; magnetic microscope; magnetic moment; magnetic properties; space resolution; Magnetic fields; Magnetic films; Magnetic moments; Magnetic properties; Magnetic separation; Magnetization; Micromagnetics; SQUIDs; Silicon; Substrates;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
