Results 41 to 50 of about 16,793 (198)

Structural Characterization and Magnetic Behavior Due to the Cationic Substitution of Lanthanides on Ferrite Nanoparticles

Nanomaterials
A new series of [Fe3−xLnx]O4 nanoparticles, with Ln = Gd; Dy; Lu and x = 0.05; 0.1; 0.15, was synthesized using the coprecipitation method. Analyses by X-ray diffraction (XRD), Rietveld refinement, and high-resolution transmission electron microscopy ...
Cristóbal Pinto García, Arianne Maine, Rodrigo A. Valenzuela-Fernández, Álvaro Aliaga Cerón, Patricia Barahona Huenchumil, Octavio Peña, Inmaculada Álvarez-Serrano, Andrés Ibáñez, Francisco Melo, Antonio Galdámez Silva   +9 more
doaj   +1 more source

Petrography and petrology of the Hawaii Scientific Drilling Project lavas: Inferences from olivine phenocryst abundances and compositions [PDF]

, 1996
The Mauna Loa (ML) and Mauna Kea (MK) lavas recovered by the Hawaii Scientific Drilling Project (HSDP) include aphyric to highly olivine-phyric basalts.
Alves, Sophie, Baker, Michael B., Stolper, Edward M.   +2 more
core   +1 more source

Síntese de pigmentos pretos à base de Fe, Co e Cr pela rota dos precursores poliméricos Synthesis of Fe-, Co- and Cr-based black pigments by the polymeric precursor route

Cerâmica, 2006
Pigmentos pretos à base de Co, Fe e Cr foram sintetizados pelo método dos precursores poliméricos. Analizou-se o efeito do tratamento térmico no desenvolvimento da cor e de estabilidade dos pigmentos. O resultado da composição otimizada do pigmento foi a
P. R. G. Gonçalves Jr, J. H. G. Rangel, M. M. Oliveira, E. Azevedo, L. P. S. dos Santos, E. Longo   +5 more
doaj   +1 more source

Interplay among Spin, Orbital and Lattice Degrees of Freedom in $t_{2g}$ Electron Systems with Edge-Sharing Network of Octahedra

, 2005
Transition metal oxides whose lattice structure has edge-sharing network of octahedra constitute a diverse group of intriguing materials besides compounds with corner-sharing octahedra such as perovskites.
Hikihara, Toshiya, Motome, Yukitoshi, Penc, Karlo, Shannon, Nic, Tsunetsugu, Hirokazu   +4 more
core   +2 more sources

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai, B.G.J. Upton, Bonadiman, C. Bonadiman, Greenbaum, Griffin, H. Downes, Irving, Johnson, Kirstein, L.A. Kirstein, Larsen, Macdonald, McDonough, Menzies, P.G. Hill, Singh, T. Ntaflos   +17 more
core   +1 more source

Inclusions, Chemical Composition, and Spectral Characteristics of Pinkish-Purple to Purple Spinels from Mogok, Myanmar

Crystals
With the increasing market demand for spinels of various colors, purple spinel—long regarded as a symbol of nobility—has attracted growing attention. In this study, pinkish-purple to purple spinels from the Mogok region of Myanmar were systematically ...
Danyu Guo, Geng Li, Liqun Weng, Meilun Zhang, Fabian Dietmar Schmitz   +4 more
doaj   +1 more source

CdV2O4: A rare example of a collinear multiferroic spinel

, 2010
By studying the dielectric properties of the geometrically frustrated spinel CdV2O4, we observe ferroelectricity developing at the transition into the collinear antiferromagnetic ground state.
Baldomir, D., Blanco-Canosa, S., Giovannetti, G., Hemberger, J., Jodlauk, S., Khomskii, D. I., Lorenz, T., Niermann, D., Pardo, V., Picozzi, S., Rivadulla, F., Rohrkamp, J., Streltsov, S., Stroppa, A.   +13 more
core   +1 more source

Mapping the magneto-structural quantum phases of Mn3O4

, 2009
We present temperature-dependent x-ray diffraction and temperature- and field-dependent Raman scattering studies of single crystal Mn3O4, which reveal the novel magnetostructural phases that evolve in the spinels due to the interplay between strong spin ...
E. Fradkin, M. Kim, P. Abbamonte, S. L. Cooper, X. M. Chen, Y. I. Joe   +5 more
core   +1 more source

Structural, orbital, and magnetic order in vanadium spinels

, 2004
Vanadium spinels (ZnV_2O_4, MgV_2O_4, and CdV_2O_4) exhibit a sequence of structural and magnetic phase transitions, reflecting the interplay of lattice, orbital, and spin degrees of freedom.
A. Abragam, C. E. Moore, J. B. Goodenough, K. I. Kugel, K. I. Kugel, O. Tchernyshyov, P. Schiffer, Y. Ueda   +7 more
core   +1 more source

Spin-lattice instability to a fractional magnetization state in the spinel HgCr2O4

, 2007
Magnetic systems are fertile ground for the emergence of exotic states when the magnetic interactions cannot be satisfied simultaneously due to the topology of the lattice - a situation known as geometrical frustration.
A Keren, A. Kikkawa, AP Ramirez, B Canals, DI Khomskii, DL Bergman, DL Bergman, EJ Samuelsen, H Tsunetsugu, H Ueda, H Ueda, H. Ueda, J-H Chung, JB Goodenough, K Penc, K. Katsumata, M Iizumi, M Motida, M. Matsuda, O Tchernyshyov, PG Radaelli, R Moessner, S-H Lee, S-H Lee, S-H Lee, S.-H. Lee, ST Bramwell, T. Inami, Y Horibe, Y Ueda, Y Yamashita, Y. Narumi, Y. Tanaka, Y. Ueda, Z Zhang   +34 more
core   +1 more source