U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Audie Castillo (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 1 - 3 of 3

Detection of Pinholes in Magnetic Tunnel Junctions by Magnetic Coupling

October 16, 2008
Author(s)
Philip Pong, Cindi L. Dennis, Audie M. Castillo, Andrew P. Chen, William F. Egelhoff Jr.
Pinholes in tunnel barriers are detrimental to the performance of magnetic tunnel junctions (MTJ) since they create direct magnetic exchange coupling between the free and pinned magnetic films and may act as current short circuits. A simple and

The Periodic Table of Damping in Doped Ni 80 Fe 20 Thin Films

October 16, 2008
Author(s)
J O. Rantschler, D Pulugurthaand, Andrew P. Chen, L M. Connors, Audie M. Castillo, Alexander J. Shapiro, William F. Egelhoff Jr., Brian B. Maranville, Robert D. McMichael
The effect of doping on the magnetic damping parameter of Ni80Fe20 is measured for 21 transition metal dopants:Ti, V, Cr, Mn, Co, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, and Au. For most of the dopants, the damping parameter increases

Ultra-Thin Aluminum Oxide as a Thermal Oxidation Barrier on Metal Films

August 1, 2002
Author(s)
L Gan, Romel Gomez, Audie M. Castillo, P J. Chen, Cedric J. Powell, William F. Egelhoff Jr.
We have investigated the role of aluminum oxide films as barriers to thermal oxidation of Co, Ni, Fe, NiFe, Mn, Ta, Cu Al and Cr in air. The oxidation of the film is monitored by measuring the electrical resistance following a brief anneal in air. We find