Výsledky vyhledávání - "HARRIS, V. G."

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High coercivity cobalt carbide nanoparticles processed via polyol reaction: A new permanent magnet material

Autor: Harris, V. G., Chen, Y., Yang, A., Yoon, S., Chen, Z., Geiler, Anton, Chinnasamy, C. N., Lewis, L. H., Vittoria, C., Carpenter, E. E., Carroll, K. J., Goswami, R., Willard, M. A., Kurihara, L., Gjoka, M., Kalogirou, O.

Cobalt carbide nanoparticles were processed using polyol reduction chemistry that offers high product yields in a cost effective single-step process. Particles are shown to be acicular in morphology and typically assembled as clusters with room tempe

Externí odkaz: http://arxiv.org/abs/0911.1277

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Nano granular metallic Fe - oxygen deficient TiO$_{2-\delta}$ composite films: A room temperature, highly carrier polarized magnetic semiconductor

Autor: Yoon, S. D., Vittoria, C., Harris, V. G., Widom, A., Miller, K. E., McHenry, M. E.

Nano granular metallic iron (Fe) and titanium dioxide (TiO$_{2-\delta}$) were co-deposited on (100) lanthanum aluminate (LaAlO$_3$) substrates in a low oxygen chamber pressure using a pulsed laser ablation deposition (PLD) technique. The co-depositio

Externí odkaz: http://arxiv.org/abs/0801.1285

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Magnetoelectric Effects on Composite Nano Granular $Fe/TiO_{2-\delta}$ Films

Autor: Yoon, S. D., Vittoria, C., Harris, V. G., Widom, A., Srivastava, Y. N.

Employing a new experimental technique to measure magnetoelectric response functions, we have measured the magnetoelectric effect in composite films of nano granular metallic iron in anatase titanium dioxide at temperatures below 50 K. A magnetoelect

Externí odkaz: http://arxiv.org/abs/0711.4776

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Magnetic Field Melting of the Charge-Ordered State of La0.5Ca0.5MnO3: A Local Structure Perspective

Autor: Tyson, T. A., Deleon, M., Crof, M., Harris, V. G., Kao, C. -C., Kirkland, J., Cheong, S. -W.

The local structure about the Mn site in the half doped system La0.5Ca0.5MnO3 was measured in magnetic fields up 10 T to probe the melting of the charge ordered state. Examination of the Mn-O and Mn-Mn correlations reveal three distinct regions in th

Externí odkaz: http://arxiv.org/abs/cond-mat/0306229

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The origin of high transport spin polarization in La$_{0.7}$Sr$_{0.3} $MnO$_{3}$: direct evidence for minority spin states

Autor: Nadgorny, B., Mazin, I. I., Osofsky, M., Soulen, Jr., R. J., Broussard, P., Stroud, R. M., Singh, D. J., Harris, V. G., Arsenov, A., Mukovskii, Ya.

Publikováno v: Phys. Rev. B, 63, 184433, 2001

Using the point contact Andreev reflection technique, we have carried out a systematic study of the spin polarization in the colossal magnetoresistive manganite, La$_{0.7}$Sr$_{0.3}$MnO$_{3}$} (LSMO). Surprisingly, we observed a significant increase

Externí odkaz: http://arxiv.org/abs/cond-mat/0011198

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