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Author: robert shull

Displaying records 41 to 50 of 65 records.
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41. Structural Effects on the Magnetic Character of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites
Published: 5/1/2003
Authors: S Taketomi, Alexander J. Shapiro, Robert D Shull
Abstract: We obtained dispersed-nanocrystal/glass composites by impregnating amorphous yttrium iron garnet (YIG) nanoparticles (made by an alkoxide method) into the 49 nanometer diameter pores in the sponge-like structure of porous silica glass (controlled p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853231

42. Structural Effects on the Matgnetic Character of Yttrium-Iron-Garnet-Nanoparticles Dispersed in Glass Composites
Published: 5/1/2003
Authors: S Taketomi, Alexander J. Shapiro, Robert D Shull
Abstract: By absorbing amorphous yttrium iron garnet (YIG) nanoparticles into the nanometer pores of the sponge-like structure of porous silica glass (controlled pore glass or CPG) followed by heat treatment, we obtained dispersed-nanocrystal/glass composites. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853239

43. Ru Spacer Thickness Dependences of the Domain Nucleation and Growth in Co/Ru/Co Synthetic Antiferromagnet
Published: 3/1/2003
Authors: V S. Gornakov, Valerian Ivanovich Nikitenko, William F. Egelhoff Jr., Robert D McMichael, Alexander J. Shapiro, Robert D Shull
Abstract: The relative orientation of Co magnetization vectors in a Co/Ru/Co/Ta structure vary gradually from parallel to antiparallel orientation as a function of Ru thickness varying from 0 nm to 1.0 nm. At intermediate average Ru thicknesses from 0.2 nm to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853278

44. Rotational Hysteresis of Exchange-Spring Magnets
Published: 10/1/2002
Authors: J.S. Jiang, S D Bader, H Kaper, G Leaf, Robert D Shull, Alexander J. Shapiro, V S. Gornakov, Valerian Ivanovich Nikitenko, C L Platt, A. E. Berkowitz, S David, E E Fullerton
Abstract: We highlight our experimental studies and micromagnetic simulations of the rotational hysteresis in exchange-spring magnets. Magneto-optical imaging and torque magnetometry measurements for SmCo/Fe exchange-spring films with uniaxial in-plane ani ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853151

45. Dynamic Antiferromagnetic Spin Structure and Domains in Exchange Coupled Multilayers.
Published: 9/2/2002
Authors: Valerian Ivanovich Nikitenko, Alexander J. Shapiro, Robert D Shull
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901754

46. Formation and Stabilization of Nanosize Grains in Ferromagnetic Thin Films by Dispersed C^d60^
Published: 7/1/2002
Authors: L A Zheng, E V Barrera, Robert D Shull
Abstract: A self-assembly grain growth model is proposed to explain the recent observation of the formation of the uniform columnar nanosize grain structures in the ferromagnetic metal-C^d60^ thin films. Calculations of the grain size based on this model comp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853049

47. Anomalous Switching Behavior of Antiparallel-Coupled CO Layers Separated by a Super-Thin Ru Spacer
Published: 5/1/2002
Authors: V S. Gornakov, Valerian Ivanovich Nikitenko, William F. Egelhoff Jr., Robert D McMichael, Alexander J. Shapiro, Robert D Shull
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853155

48. Experimental Study of Magnetic Interactions Between Colloidal Particles in Magnetic Fluids
Published: 5/1/2002
Authors: S Taketomi, Robert D Shull
Abstract: In order to clarify whether or not there is any magnetic interaction between the magnetic colloidal particles in magnetic fluids (MF's), we compare the magnetization curve of a mother MF with that of a 1000-fold diluted solution. For a MF which show ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853113

49. Magnetic Behavior of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites
Published: 5/1/2002
Authors: S Taketomi, Robert D Shull
Abstract: By absorbing amorphous yttrium iron garnet (YIG) nanoparticles into nanosized pores of a controlled pore glass (CPG) followed by heat treatment, we synthesized YIG nanocrystal-dispersed glass composites. In a sample which was prepared with CPG of 30 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853114

50. Multi-Step Magnetic Switching in Single-Crystal (001) Co^d2^MnGe Films
Published: 5/1/2002
Authors: F Y Yang, C H Shang, T Ambrose, J J Krebs, G A Prinz, Valerian Ivanovich Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D Shull, C L Chien
Abstract: 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 magnetocr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853139



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