Actions for Net anisotropy and ferromagnetic resonance frequency of an amorphous ferromagnet

Email RIS file
Bookmark
Report an Issue

Net anisotropy and ferromagnetic resonance frequency of an amorphous ferromagnet

Author
Richards, P. M.
Published
United States : [publisher not identified], 1975.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1975.
Physical Description
microfiche : negative ; 11 x 15 cm

Availability

I Want It
I Want It

Finding items...

Summary
The net anisotropy constants and the ferromagnetic resonance (FMR) frequency are calculated in a model of amorphous ferromagnetism for which the axes of strong local uniaxial anisotropy are nearly randomly oriented throughout the sample, and, consequently, the equilibrium directions of local magnetization are nonuniform. A slight preferential ordering produces net anisotropy perpendicular to the plane of a thin film sample as appropriate to sputtered Gd-- Co films. The net anisotropy is a maximum for a given HA/ near HA/ H/ sub E/ = 1.5, where HA/ and HE/ are the local anisotropy and exchange fields, and at HA//HE/ = 10 it is less than its value for HA//H/ sub E/ Yields 0, corresponding to uniform magnetization. The FMR resonance frequency omega would contain a term of the order of H2A//HE/, which can be comparable to the net anisotropy field (HA/), if the magnetization were uniform, but this term cancels out if proper account is taken of the nonuniformity. As a result, omega is the same as would be computed for a uniform anisotropy field (HA/). (auth)
Report Numbers
SAND-75-5779; CONF-751209-1
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-33-015272
OSTI Identifier 4100815
Research organization: Sandia Labs., Albuquerque, N.Mex. (USA).
View MARC record | catkey: 47032797