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Topic Area: Nanomagnetics
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Displaying records 201 to 210 of 216 records.
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201. Techniques to Measure Magnetic Domain Structures
Topic: Nanomagnetics
Published: 9/11/2000
Authors: Robert Celotta, John Unguris, Michael H Kelley, Daniel Thornton Pierce
Abstract: A summary of the current techniques for magnetic domain imaging of materials, including the practical aspects of each technique, the requirements on the sample, the specimen modification allowed and the problems normally encountered. References to m ...

202. Temperature Dependence of Exchange Bias in Polycrystalline Ferromagnet-Antiferromagnet Bilayers
Topic: Nanomagnetics
Published: 11/1/1999
Authors: Mark D Stiles, Robert D McMichael
Abstract: We describe a simple model for the temperature dependence of the exchange bias and related effects that result from coupling a ferromagnetic thin film to a polycrystalline antiferromagnetic film. In this model, an important source of temperature dep ...

203. Terbium-Doped Magnetite Nanocrystals for Multimodal Imaging Agents
Topic: Nanomagnetics
Published: Date unknown
Authors: Katherine P Rice, Stephen E Russek, Roy Howard Geiss, Justin M Shaw, Robert John Usselman, Eric R Evarts, Thomas J Silva, Hans Toya Nembach, Elke Arenholz, Yves Idzerda
Abstract: High quality cubic Tb-doped magnetite nanocrystals have been fabricated and have shown that the Tb is incorporated into the octahedral 3+ sites. Magnetization and FMR data indicate that the Tb spins are weakly coupled to the iron spin lattice at ...

204. The Effect of Stress Induced Anisotropy in Patterned FeCo Thin Film Structures
Topic: Nanomagnetics
Published: 4/24/2006
Authors: W Yu, J A Bain, Willard C Uhlig, John Unguris
Abstract: In this work, 1 {mu}m thick FeCeo films with {math minus}320 MPa compressive stress and FeCo/NiFe films with 600 MPa tensile stress were patterened into 5{mu}m x 20 {mu}m elements. The stress anisotropy resulting from patterning was measured using x ...

205. The Magnetic Order of Cr in Fe/Cr/Fe(001) Trilayers
Topic: Nanomagnetics
Published: 1/1/2001
Authors: Daniel Thornton Pierce, John Unguris, Robert Celotta, Mark D Stiles
Abstract: The temperature dependence of the short period oscillatory coupling in Fe/Cr/Fe(001) whisker trilayers, when analyzed in light of recent theory, provides strong evidence that incommensurate spin density wave antiferromagnetic order is induced in the ...

206. The NIST Magnetic Imaging Reference Sample
Topic: Nanomagnetics
Published: 1/1/1997
Authors: Paul Rice, Stephen E Russek, J Hoinville, Michael H Kelley
Abstract: We have further developed the NIST magnetic imaging reference sample to include a magnetic pattern which can indicate the magnetic polarity of a magnetic force microscope tip. Several samples cut from the same disk were measured with a single tip. ...

207. The Trade-off Between Large GMR and Small Coercivity in Symmetric Spin Valves
Topic: Nanomagnetics
Published: 1/1/1996
Authors: William F. Egelhoff Jr., P J Chen, Cedric John Powell, Mark D Stiles, Robert D McMichael, C Lin, J Sivertsen, J Judy, K Takano, A Berkowitz
Abstract: We have investigated the use of various alloys as substitutes for pure Co in the center film of symmetric spin valves of the type NiO/Co/Cu/Co/Cu/Co/NiO. The aim of this work is to identify magnetic materials that exhibit smaller coercivities than pu ...

208. Theory of Spin Polarized Secondary Electrons in Transition Metals
Topic: Nanomagnetics
Published: 1/1/1985
Authors: David R. Penn, S Apell
Abstract: We show that in contrast to the secondary-electron intensity distribution, the spin polarization, P(E), yields useful information about the electron-electron interaction. The ratio of lifetimes of majority- to minority-spin electrons can be determine ...

209. Theory of Spin Transfer Torque
Topic: Nanomagnetics
Published: 9/1/2007
Author: Mark D Stiles
Abstract: In magnetic multilayers, the spin polarized currents flowing between the magnetic layers can exert torques on the magnetizations of the layers when the magnetizations are not collinear. The theory of these spin transfer torques is developed in term ...

210. Theory of a magnetic microscope with nanometer resolution
Topic: Nanomagnetics
Published: 1/1/2001
Authors: P Johansson, S Apell, David R. Penn
Abstract: We propose a theory for a type of apertureless scanning near field microscopy that is intended to allow the measurement of magnetism on a nanometer length scale. A scanning tunneling microscope (STM) is used to scan a magnetic substrate while a laser ...

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