16 research outputs found
Magnetically-Confined Fe-Mn Bimetallic Oxide Encapsulation as an Efficient and Recoverable Adsorbent for Arsenic(III) Removal
Full text linkUnravelling the Elusive Antiferromagnetic Order in Wurtzite and Zinc Blende CoO Polymorph Nanoparticles
Get PDFAltres ajuts: Beatriu de Pinos Fellowship (ref 2011 BP_B 00209)Although cubic rock salt-CoO has been extensively studied, the magnetic properties of the main nanoscale CoO polymorphs (hexagonal wurtzite and cubic zinc blende structures) are rather poorly understood. Here, a detailed magnetic and neutron diffraction study on zinc blende and wurtzite CoO nanoparticles is presented. The zinc blende-CoO phase is antiferromagnetic with a 3rd type structure in a face-centered cubic lattice and a Néel temperature of T (zinc-blende) ≈225 K. Wurtzite-CoO also presents an antiferromagnetic order, T (wurtzite) ≈109 K, although much more complex, with a 2nd type order along the c-axis but an incommensurate order along the y-axis. Importantly, the overall magnetic properties are overwhelmed by the uncompensated spins, which confer the system a ferromagnetic-like behavior even at room temperature
Valores y Actitudes de la Población de Nuevo León. Cuadernos del Centro de Estudios Estratégicos-Primera Edición
No full textCobalt nitrides as a class of metallic electrocatalysts for the oxygen evolution reaction
No full textInvolvement of endoplasmic reticulum stress response and IRE1-mediated ASK1/JNK/Mcl-1 pathways in silver nanoparticle-induced apoptosis of human retinal pigment epithelial cells
No full textFormulation of Chitosan Polymeric Vesicles of Ciprofloxacin for Ocular Delivery: Box-Behnken Optimization, In Vitro Characterization, HET-CAM Irritation, and Antimicrobial Assessment
No full textUnraveling the multi-featured magnetic behavior of Nd0.75Sr0.25CoO3 perovskite nanocrystals annealed at different temperatures
No full textMetal fractionation in topsoils and bed sediments in the Mero River rural basin: Bioavailability and relationship with soil and sediment properties
No full textUnravelling the Elusive Antiferromagnetic Order in Wurtzite and Zinc Blende CoO Polymorph Nanoparticles
No full textLate Holocene ecological history of Pinus pinaster forests in the Sierra de Gredos of central Spain
No full text15 páginas, 4 figuras, 1 tabla.This article describes the patterns and processes of vegetation change and fire history in the Late Holocene (c. 2400 calendar year BP) palaeoecological sequence of Lanzahíta, Sierra de Gredos in central Spain, and provides the first Iberian pollen sequence undertaken within a monospecific Pinus pinaster woodland. These new data reassess not only the autochthonous nature of this pine species in the region and the Iberian Peninsula, but also the naturalness of well-developed cluster pine forests. Conflicts of palaeoecological evidence with phytosociological models of vegetation dynamics in the study region, and the relationships of P. pinaster with fire occurrence in Mediterranean-type ecosystems, are discussed.This study was funded by the projects
HAR2008-06477-C03-03/HIST, CGL-2006-2956-BOS (Plan
Nacional I + D + i, Ministry of Education and Science,
Spain), CSD2007-00058 (Consolider Program, Consejo
Superior de Investigaciones Científicas, Spain) and
Paleodiversitas Network (Fundación Séneca, Murcia).Peer reviewe
