Outputs (116)

Harnessing microbial subsurface metal reduction activities to synthesise nanoscale cobalt ferrite with enhanced magnetic properties (2009)
Journal Article
Coker, V. S., Telling, N. D., van der Laan, G., Pattrick, R. A., Pearce, C. I., Arenholz, E., …Lloyd, J. R. (2009). Harnessing microbial subsurface metal reduction activities to synthesise nanoscale cobalt ferrite with enhanced magnetic properties. Lawrence Berkeley National Laboratory,

Nanoscale ferrimagnetic particles have a diverse range of uses from directed cancer therapy and drug delivery systems to magnetic recording media and transducers. Such applications require the production of monodisperse nanoparticles with well-contro... Read More about Harnessing microbial subsurface metal reduction activities to synthesise nanoscale cobalt ferrite with enhanced magnetic properties.

Remediation of Cr(VI) by biogenic magnetic nanoparticles: An x-ray magnetic circular dichroism study (2009)
Journal Article
Telling, N. D., Coker, V. S., Cutting, R. S., van der Laan, G., Pearce, C. I., Pattrick, R. A. D., …Lloyd, J. R. (2009). Remediation of Cr(VI) by biogenic magnetic nanoparticles: An x-ray magnetic circular dichroism study. Applied Physics Letters, 95(16), https://doi.org/10.1063/1.3249578

Biologically synthesized magnetite
nanoparticles are studied using x-ray absorption and x-ray magnetic circular dichroism following exposure to hexavalent Cr solution. By examining their magnetic state, Cr cations are shown to exist in trivalent f... Read More about Remediation of Cr(VI) by biogenic magnetic nanoparticles: An x-ray magnetic circular dichroism study.

Tunnel magnetoresistance in epitaxially grown magnetic tunnel junctions using Heusler alloy electrode and MgO barrier (2009)
Journal Article
Tsunegi, S., Sakuraba, Y., Oogane, M., Telling, N. D., Shelford, L. R., Arenholz, E., …Ando, Y. (2009). Tunnel magnetoresistance in epitaxially grown magnetic tunnel junctions using Heusler alloy electrode and MgO barrier. Journal of Physics D: Applied Physics, 42(19), Article 195004. https://doi.org/10.1088/0022-3727/42/19/195004

Epitaxially grown magnetic tunnel junctions (MTJs) with a stacking structure of Co2MnSi/MgO/CoFe were fabricated. Their tunnel magnetoresistance (TMR) effects were investigated. The TMR ratio and tunnelling conductance characteristics of MTJs were co... Read More about Tunnel magnetoresistance in epitaxially grown magnetic tunnel junctions using Heusler alloy electrode and MgO barrier.

Harnessing the Extracellular Bacterial Production of Nanoscale Cobalt Ferrite with Exploitable Magnetic Properties (2009)
Journal Article
Coker, V. S., Telling, N. D., van der Laan, G., Pattrick, R. A. D., Pearce, C. I., Arenholz, E., …Lloyd, J. R. (2009). Harnessing the Extracellular Bacterial Production of Nanoscale Cobalt Ferrite with Exploitable Magnetic Properties. ACS Nano, 3(7), 1922-1928. https://doi.org/10.1021/nn900293d

Nanoscale ferrimagnetic particles have a diverse range of uses from directed cancer therapy and drug delivery systems to magnetic recording media and transducers. Such applications require the production of monodisperse nanoparticles with well-contro... Read More about Harnessing the Extracellular Bacterial Production of Nanoscale Cobalt Ferrite with Exploitable Magnetic Properties.

Reductive Microbial Transformations of Iron Oxides; Engineering Biominerals for the Remediation of Metals and Organics (2009)
Presentation / Conference
Lloyd, J., Coker, V., Cutting, R., Hofstetter, T., Mosberger, L., Telling, N., …Vaughan, D. (2009, January). Reductive Microbial Transformations of Iron Oxides; Engineering Biominerals for the Remediation of Metals and Organics. Presented at Awards Ceremony Speeches and Abstracts of the 19th Annual V.M. Goldschmidt Conference, Davos, Switzerland

Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition (2009)
Journal Article
Cebollada, A., García Martín, J. M., Clavero, C., Balcells, L., Estradé, S., Arbiol, J., …van der Laan, G. Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition. Physical review B: Condensed matter and materials physics, 79(1), https://doi.org/10.1103/physrevb.79.014414

We present a detailed study on the morphology and magnetic properties of Co nanostructures deposited onto oxidized Si substrates by femtosecond pulsed laser deposition. Generally, Co disks of nanometric dimensions are obtained just above the ablation... Read More about Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.

X-ray absorption and magnetic circular dichroism characterization of a novel ferromagnetic MnNx phase in Mn/Si3N4 multilayers (2008)
Journal Article
Céspedes, E., Huttel, Y., Martínez, L., de Andrés, A., Chaboy, J., Vila, M., …Prieto, C. (2008). X-ray absorption and magnetic circular dichroism characterization of a novel ferromagnetic MnNx phase in Mn/Si3N4 multilayers. Applied Physics Letters, 93(25), https://doi.org/10.1063/1.3050534

Ferromagnetism above room temperature has been observed in
multilayered films for the first time. Characterization of the structural and electronic properties was performed to study the ferromagnetic behavior of this system. X-ray absorption spect... Read More about X-ray absorption and magnetic circular dichroism characterization of a novel ferromagnetic MnNx phase in Mn/Si3N4 multilayers.

Evidence of local moment formation in Co-based Heusler alloys (2008)
Journal Article
Telling, N. D., Keatley, P. S., van der Laan, G., Hicken, R. J., Arenholz, E., Sakuraba, Y., …Miyazaki, T. Evidence of local moment formation in Co-based Heusler alloys. Physical review B: Condensed matter and materials physics, 78(18), https://doi.org/10.1103/physrevb.78.184438

We examine the formation of local moments in Heusler alloys of the composition
Co2MnZ (where Z=Si or Al) using the combined techniques of x-ray magnetic circular and linear dichroism. The existence of local moments in half-metallic Heusler alloys i... Read More about Evidence of local moment formation in Co-based Heusler alloys.

THE OXIDATION STATE OF COPPER AND COBALT IN CARROLLITE, CuCo2S4 (2008)
Journal Article
Pattrick, R. A., Coker, V. S., Pearce, C. I., Telling, N. D., & van der Laan, G. (2008). THE OXIDATION STATE OF COPPER AND COBALT IN CARROLLITE, CuCo2S4. Canadian Mineralogist, 46(5), 1317-1322. https://doi.org/10.3749/canmin.46.5.1317

Using X-ray absorption spectroscopy (XAS) at the Cu L2,3 and Co L2,3 edges, we demonstrate that the valence state of copper in the thiospinel carrollite (CuCo2S4) is Cu+ with a d count of Cu d9.8. The Co has a d count of d6.4, so that the highly cova... Read More about THE OXIDATION STATE OF COPPER AND COBALT IN CARROLLITE, CuCo2S4.

Interface alloying effects in the magnetic properties of Fe nanoislands capped with different materials (2008)
Journal Article
Huttel, Y., Navarro, E., Telling, N. D., van der Laan, G., Pigazo, F., Palomares, F. J., …Cebollada, A. Interface alloying effects in the magnetic properties of Fe nanoislands capped with different materials. Physical review B: Condensed matter and materials physics, 78(10), https://doi.org/10.1103/physrevb.78.104403

We show that Fe nanoislands capped with Al, Pd, and Pt protecting layers include an alloy at the interface with the capping layer, which explains the previously known capping layer dependence on the interparticle magnetic coupling. Vibrating sample m... Read More about Interface alloying effects in the magnetic properties of Fe nanoislands capped with different materials.