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Search Publications by: Robert D. Shull (Assoc)

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Displaying 151 - 175 of 188

Anomalous Switching Behavior of Antiparallel-Coupled CO Layers Separated by a Super-Thin Ru Spacer

May 15, 2002
Author(s)
V S. Gornakov, Valerian I. Nikitenko, William F. Egelhoff Jr., Robert D. McMichael, Alexander J. Shapiro, Robert D. Shull
The details of the magnetization reversal mechanisms upon field reversal in coupled ferromagnetic CO (2.5 nm)/Ru(0.5 nm)/Co (2.6 nm) trilayers deposited on obliquely sputtered Ta (10.6 nm) underlayers were studied using the magneto-optical indicator film

Multi-Step Magnetic Switching in Single-Crystal (001) Co 2 MnGe Films

April 23, 2002
Author(s)
F Y. Yang, C H. Shang, T Ambrose, J J. Krebs, G A. Prinz, Valerian I. Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D. Shull, C L. Chien
Multi-step magnetic switching with single, double, and triple loops has been observed in single-crystal (001) Co2MnGe Heusler alloy films epitaxially grown on GaAs (001) substrates due to a combined magnetic anisotropy consisting of cubic

Rare-Earth Garnets and Perovskites for Space-Based ADR Cooling at High T and Low H

March 1, 2002
Author(s)
T T. King, B A. Rowlett, R A. Ramirez, E R. Canavan, M J. DiPirro, J S. Panek, J G. Tuttle, Robert D. Shull, R A. Fry
Future NASA satellite detector systems must be cooled to the 0.1K temperature range to meet the stringent energy resolution and sensitivity requirements demanded by mid-term astronomy missions. The development of adiabatic demagnetization refrigeration

Features of Domain Nucleation and Growth in Co/Ru/Co Synthetic Antiferromagnets Deposited on Obliquely Sputtered Ta Underlayers

February 1, 2002
Author(s)
Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, Robert D. McMichael, William F. Egelhoff Jr., Y W. Tahk, Robert D. Shull, L Gan
Obliquely sputtered Ta underlayers were used to stabilize antiferromagnetically couple Co/Ru/Co/Ta structures with a strong uniaxial anistropy. Magneto-optical indicator film (MOIF) imaging revealed nucleation and growth of domains during remagnetization

Spin Spring Behavior in Exchange Coupled Soft and High-Coercivity Hard Ferromagnets

July 1, 2001
Author(s)
Robert D. Shull, Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, J.S. Jiang, H Kaper, G Leaf, S D. Bader
The magnetization reversal processes in an epitaxial Fe/Sm 2Co 7 structure were investigated using the magneto-optical indicator film technique. The dependence of the magnitude and the orientation of the structure average magnetization have been studied on

Abstracts for the MSEL Assessment Panel, March 2001

January 26, 2001
Author(s)
Leslie E. Smith, Alamgir Karim, Leonid A. Bendersky, C Lu, J J. Scott, Ichiro Takeuchi, Kathleen M. Flynn, Vinod K. Tewary, Davor Balzar, G A. Alers, Stephen E. Russek, Charles C. Han, Haonan Wang, William E. Wallace, Daniel A. Fischer, K Efimenko, Wen-Li Wu, Jan Genzer, Joseph C. Woicik, Thomas H. Gnaeupel-Herold, Henry J. Prask, Charles F. Majkrzak, Norman F. Berk, John G. Barker, Charles J. Glinka, Eric K. Lin, Ward L. Johnson, Paul R. Heyliger, David T. Read, R R. Keller, J Blendell, Grady S. White, Lin-Sien H. Lum, Eric J. Cockayne, Igor Levin, C E. Johnson, Maureen E. Williams, Gery R. Stafford, William J. Boettinger, Kil-Won Moon, Daniel Josell, Daniel Wheeler, Thomas P. Moffat, W H. Huber, Lee J. Richter, Clayton S. Yang, Robert D. Shull, R A. Fry, Robert D. McMichael, William F. Egelhoff Jr., Ursula R. Kattner, James A. Warren, Jonathan E. Guyer, Steven P. Mates, Stephen D. Ridder, Frank S. Biancaniello, D Basak, Jon C. Geist, Kalman D. Migler
Abstracts relating to research and development in the NIST Materials Science and Engineering Laboratory (MSEL) are presented for a poster session to be presented to the 2001 MSEL Assessment Panel.

Absolute Magnetic Moment Measurements of Nickel Spheres

May 1, 2000
Author(s)
Robert D. Shull, Robert D. McMichael, L Swartzendruber, Stefan D. Leigh
The preparation and measurement of nickel spheres for use in the calibration of magnetometers are described. The absolute value of the magnetic moment of a set these spheres near room temperature was measured using the Faraday method. The variations of