The Change of Magnetoresistance Peaks According to the Direction of Sample Relative to the Magnetic Field

概要

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The change of magnetoresistance(MR)peaks according to the direction of the film sample relative to the magnetic field has been investigated for various angle configurations of the sample relative to the field. When the sample is in the same plane as that of the magnetic flux, the MR peaks are found to change their shapes, as the sample is rotated through an axis perpendicular to the sample surface, and finally to show their minima at the rotation angle of 45°. However, if the sample is inclined relative to the field, the MR peaks show their minima at t rotation angle higher than 45°. This behavior can be explained by the mixing of the negative MR(NMR)and positive MR(PMR)signals in MR. Furthermore, we also observe the increase of the magnetic field difference between two MR peaks(FDMP)as a function of the rotation angle, φ, for the angle configuration of the sample perpendicular to the field. This increase in FDMP is fitted well as a function of 1/cosφ, which is well explained by the concept of the effective magnetic field.
社団法人応用物理学会の論文
2000-11-15