Accession Number:

AD0780703

Title:

Magnetization Switching in a Magneto-Optic Thin Film

Descriptive Note:

Quarterly technical rept., no. 4, 1 Nov-31 Dec 1973

Corporate Author:

IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s):

• White, James M.
• Tseng, S. C.

Report Date:

1974-06-01

Pagination or Media Count:

25.0

Abstract:

An improved technique for observing sub-nanosecond magnetization changes in thin films has been used to study the underdamped oscillatory behavior in a Y2.5Gd.5Fe4Ga1O12 sample. The measurement set-up uses a version of the alternate sampling technique in which the sensitivity has been upgraded by the use of a lock-in amplifier. By using a shorted strip-line of appropriate length to apply to the film two properly timed magnetic field steps, the precession of the magnetization can be quelled, and the magnetization can be switched between initial and final directions in a half-cycle of the resonant frequency.

Descriptors:

• *MAGNETOOPTICS
• *WAVEGUIDES
• GADOLINIUM COMPOUNDS
• GALLATES
• GALLIUM COMPOUNDS
• GARNET
• IRON COMPOUNDS
• MODULATION
• THIN FILMS
• YTTRIUM IRON GARNET

Subject Categories:

• Electrical and Electronic Equipment
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE