The structure and strain of ultrathin CoO films grown on a Pt(0 0 1) substrate and on a ferromagnetic FePt pseudomorphic layer on Pt(0 0 1) have been determined with in situ and real time surface x-ray diffraction. The films grow epitaxially on both surfaces with an in-plane hexagonal pattern that yields a pseudo-cubic CoO(1 1 1) surface. A refined x-ray diffraction analysis reveals a slight monoclinic distortion at RT induced by the anisotropic stress at the interface. The tetragonal contribution to the distortion results in a ratio [Formula: see text], opposite to that found in the low temperature bulk CoO phase. This distortion leads to a stable Co(2+) spin configuration within the plane of the film.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/0953-8984/27/8/085001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Crystal structure and Hirshfeld surface analysis of (nitrato-κ ,')(1,4,7,10-tetra-aza-cyclo-dodecane-κ )nickel(II) nitrate.
Acta Crystallogr E Crystallogr Commun
October 2024
Rigaku Americas Corporation, The Woodlands Texas 77381 USA.
The crystal structure of the title compound, [Ni(CHN)(NO)]NO, at room temperature, has monoclinic (2/) symmetry. The structure displays inter-molecular hydrogen bonding. The nickel displays a distorted bipyramidal geometry with the symmetric bidentate bonded nitrate occupying an equatorial site.
View Article and Find Full Text PDFTriclinic polymorph of bis-[2-methyl-3-(pyridin-2-yl)imidazo[1,5-]pyridin-2-ium] tetra-chloridocadmium(II).
Acta Crystallogr E Crystallogr Commun
October 2024
Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
The crystal structure of the title organic-inorganic hybrid salt, (CHN)[CdCl], (I), has been reported with four mol-ecules in the asymmetric unit in a monoclinic cell [Vassilyeva (2021 ▸). , , 7713-7722]. While using two different aldehydes in the oxidative cyclization-condensation involving CHNH·HCl to prepare a new monovalent cation with the imidazo[1,5-]pyridinium skeleton, a new polymorph was obtained for (I) in space group 1 and a unit cell with approximately half the volume of the monoclinic form.
View Article and Find Full Text PDFHigh-pressure phase transition and amorphization of BaVO.
Dalton Trans
December 2024
Departamento de Física Aplicada-Instituto de Ciencia de Materiales, MALTA Consolider Team, Universidad de Valencia, Edificio de Investigación, C/Dr. Moliner 50, Burjassot, 46100 Valencia, Spain.
The structural evolution of metavanadate compounds under high pressure offers valuable insights into phase transitions and changes in material properties. This study explores the structural behavior of BaVO under pressures up to 12 GPa using powder X-ray diffraction and density-functional theory (DFT) simulations. The results indicate a phase transition from the ambient pressure orthorhombic phase (space group 222) to a monoclinic phase (space group 2) at 4 GPa, likely driven by the distortion of the vanadium oxide polyhedron.
View Article and Find Full Text PDFSynthesis, Optical, and Magnetic Properties of the Mixed Chalcogenide Semiconductor Series Eu(II)SiSeS, Prepared via the Flux-Assisted Boron Chalcogen Mixture Method.
Inorg Chem
December 2024
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States.
We report a detailed structural study of a series of five new quaternary Eu(II)-containing mixed chalcogenide phases, EuSiSeS, EuSiSeS, EuSiSeS, EuSiSeS, and EuSiSe, synthesized using the flux-assisted boron chalcogen mixture (BCM) method. High-quality crystals were grown, and their crystal structures were determined by single-crystal X-ray diffraction. All members of the EuSiSeS series crystallize in the monoclinic crystal system with space group 2/, except EuSiSe, which crystallizes in the 2 space group.
View Article and Find Full Text PDFLong-term relaxation of orientational disorder and structural modifications in molecular nitrogen at high pressure.
J Chem Phys
November 2024
University of Chicago, GeoSoilEnviroCARS, Advanced Photon Source, Lemont, Illinois 60439, USA.
Up to 17 GPa, the crystalline phases of N2 are characterized by pronounced orientational disorder, whereas the higher-pressure phases of molecular N2 are ordered. This raises the question about long-term relaxation of orientational disorder within the low- to intermediate-pressure regime. Here, this question is addressed by comparing synthetic with natural, chemically pure, solid N2 that resides as inclusions in diamonds at 300 K for about 108 years at pressures up to 11 GPa.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!