National_Catalogues: Permalloy Film Array Spin Dynamics and High Performance Integrated Microwave Devices
Title:
Permalloy Film Array Spin Dynamics and High Performance Integrated Microwave Devices
Identifier:
ADA500811
STOAbstractExternal:
Major contributions of this project include (1) the highest permalloy (Py) array FMR frequency reported so far without DC magnetic bias field, and (2) an ultra-sensitive method for ferromagnetic material characterization. Shape-induced high frequency properties of patterned submicron Py arrays are obtained. Py films are sputtered and patterned on gold (Au) transmission lines. Chromium (Cr) is used as adhesion layers for Au and Py deposition. Each Py bar in the arrays is 10 ?m long and 100 nm thick. The widths of the Py bars in two different arrays are 240 nm and 550 nm, respectively. Micromagnetic simulations indicate single domain magnetization distribution in these Py structures. The measured ferromagnetic resonance frequencies (FMR) without bias field are ~ 11.5 GHz and ~ 8 GHz, respectively. A new high-frequency method is proposed and demonstrated to significantly reduce parasitic effects through an on-chip interference process. As a result, measurement sensitivity is dramatically improved in comparison with conventional on-chip transmission line FMR methods. On-chip 10-GHz structures were fabricated to experimentally demonstrate a 35-dB sensitivity improvement. To demonstrate the proposed algorithms, a total of 180 patterned micro-Py stripes are used. Reasonable FMR line width and complex permeability are obtained.
STOAuthorExternal:
CLEMSON UNIV SC OFFICE OF SPONSORED PROGRAM Wang, Pingshan
STOClassificationExternal:
N
STOKeywordsExternal:
*PERMALLOY, MICROMAGNETICS, PE611102
STOPublisher:
USA
Language:
English
STOReportSource:
http://www.dtic.mil/docs/citations/ADA500811
Published:
9/25/2008
Created at 11/9/2016 3:26 PM by System Account
Last modified at 11/9/2016 3:26 PM by System Account
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