Author: "Chopdekar R.V." / Database: Gale General OneFile - Searchworks@Jio Institute Digital Library Search Results

Author: Farshchi, R., Hwang, D.J., Chopdekar, R.V., Ashby, P.D., Grigoropoulos, C.P., and Dubon, O.D.
Subjects: Gallium arsenide -- Magnetic properties, Gallium arsenide -- Electric properties, Hydrogenation -- Analysis, Ablation (Vaporization technology) -- Usage, Manganese -- Magnetic properties, Manganese -- Electric properties, Physics
Abstract: Femtosecond laser pulses are used to demonstrate the direct writing of ferromagnetism in hydrogenated [Ga.sub.0.96][Mn.sub.0.04]As. Interruption of the laser beam during writing which leads to the formation of a paramagnetic gap with controllable conductance separating two ferromagnetic line segments along with the laser tunability of magnetic and electrical properties in the activated regions represent a planar approach to defining all-semiconductor spintronic structures for device applications.
Published: 2009

Author: Nelson-Cheeseman, B.B., Chopdekar, R.V., Bettinger, J.S., Arenholz, E., and Suzuki, Y.
Subjects: Iron -- Magnetic properties, Manganese -- Magnetic properties, Nickel alloys -- Magnetic properties, Spinel group -- Magnetic properties, Physics
Abstract: The magnetic properties of the isostructural spinel-spinel interface of Ni[Mn.sub.2][O.sub.4] (NMO)-[Fe.sub.3][O.sub.4] are examined. The results have shown that the magnetic properties have come from a thin interdiffused region of [(Fe, Mn, Ni).sub.3][O.sub.4] at the interface, which has led to Mn and Ni magnetic properties similar to those of Mn[Fe.sub.2][O.sub.4] and Ni[Fe.sub.2][O.sub.4].
Published: 2008

Author: Liberati, M., Neulinger, J.R., Chopdekar, R.V., Bettinger, J.S., Arenholz, E., Butler, W.H., Stacy, A.M., Idzerda, Y.I., and Suzuki, Y.
Subjects: Circular dichroism -- Analysis, Halogens -- Electric properties, Halogens -- Magnetic properties, Selenium compounds -- Electric properties, Selenium compounds -- Magnetic properties, Selenium compounds -- Chemical properties, Semiconductor doping -- Analysis, X-ray spectroscopy -- Usage, Physics
Abstract: Chemically sensitive x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) are used for addressing a long standing controversy regarding the electronic and magnetic states of Cu[Cr.sub.2][Se.sub.4] via halogen doping of the Se anion site in Cu[Cr.sub.2][Se.sub.4-x][Y.sub.x] (Y = Cl and Br). XMCD spectra have shown the presence of a magnetic moment associated with the Cu ions that is aligned antiparallel to the Cr moment.
Published: 2008

Author: Scarpulla, M.A., Farshchi, R., Stone, P.R., Chopdekar, R.V., Yu, K.M., Suzuki, Y., and Dubon, O.D.
Subjects: Ferromagnetism -- Analysis, Gallium -- Magnetic properties, Gallium -- Electric properties, Ion implantation -- Usage, Manganese -- Magnetic properties, Manganese -- Electric properties, Physics
Abstract: The magnetic and magnetotransport properties of thin films of ferromagnetic [Ga.sub.1-x][Mn.sub.x]As, which is prepared by using ion implantation and pulsed-laser melting (II-PLM), are examined. It is shown that II-PLM [Ga.sub.1-x][Mn.sub.x]As films are free from interstitial [Mn.sub.I] due to the high-temperature processing.
Published: 2008

Author: Alldredge, L.M.B., Chopdekar, R.V., Nelson-Cheeseman, B.B., and Suzuki, Y.
Subjects: Insulating materials -- Magnetic properties, Insulating materials -- Research, Insulation (Heat) -- Magnetic properties, Insulation (Heat) -- Research, Magnetoresistance -- Research, Magnetic fields -- Research, Physics
Abstract: [Fe.sub.3][O.sub.4]/[Mg.sub.2]Ti[O.sub.4] (MTO/[La.sub.0.7][Sr.sub.0.3]Mn[O.sub.4] (LSMO) junctions were fabricated using pulsed layer deposition and characterized. Measurements of the junction magnetoresistrance performed on junctions with barrier thicknesses ranging from 50-120 Angstroms showed that the resistance jumps in junction magnetoresistance (JMR) correspond well to the switching fields of the LSMO and [Fe.sub.3][O.sub.4] magneto electrodes.
Published: 2006

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