2 edition of Structural and magnetic studies of manganese perovskite-related materials found in the catalog.
Structural and magnetic studies of manganese perovskite-related materials
Lisa Jane Gillie
Thesis (Ph.D.) - University of Birmingham, School of Chemical Sciences, 2003.
|Statement||by Lisa Jane Gillie.|
|The Physical Object|
|Pagination||viii, 270 p. :|
|Number of Pages||270|
The electronic structures and magnetic properties of manganese (Mn)-doped formamidinium lead halide perovskite compounds (FAPbI 3, where FA = NH 2 CHNH 2 +) were investigated for solar cell effects of Mn doping into FAPbI 3 crystals on electronic structures, chemical shifts in nuclear magnetic resonance, and optical absorption spectra were studied by first-principles. It undergoes a structural phase transition at K into a monoclinic structure, space group P2 1 /n. X-ray diffraction, dielectric, IR and Raman studies show that the ordering of the acetamidinium cations triggers the phase transition. Low-temperature magnetic studies show that this compound exhibits weak ferromagnetic properties below by:
Synthesis and temperature-dependent studies of a perovskite-like manganese formate framework templated with protonated acetamidine†. Mirosław Mączka * a, Jan Janczak a, Monika Trzebiatowska a, Adam Sieradzki b, Sebastian Pawlus cd and Adam Pikul a a Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Box , Wrocław 2, by: It was found that the manganese perovskite oxides Ln Ca MnO 3 (Ln=Ho, Er, Tm, Yb and Lu) have an orthorhombic structure (space group Pnma). The Mn-O-Mn angles were calculated to be ∼°, revealing an existence of a large crystallographic distortion in these by:
1 Introduction to Magnetic Oxides J. M. D. Coey, M. Venkatesan, and Hongjun Xu Oxides are ubiquitous. The Earth’s crust and mantle are largely made up of compounds of metal cations and oxygen anions. Looking at the composition of the crust in Figure , we see that oxygen is the most abundant element and the most common metals are aluminum. The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of.
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Magnetic perovskite with multi functional properties (magneto-resistive, magneto-dielectric, multiferroics, spintronics, etc.) have attracted increasing attention due to their possible applications towards storage materials and intriguing fundamental Physics.
Despite the numerous investigations on. The magnetic properties seem to indicate strong antiferromagnetic correlations along the chains, but no three-dimensional (3D) magnetic long range order is observed.
The global magnetic behavior indicates a partially ordered system, close to a magnetic spin by: The magnetic behaviour of O 3−δ materials is different than that shown by R 3−δ samples, in spite that both composition and structure are identical.
Both O and O samples show a first PM–FM transition, the magnetization value being higher for the O by: 7. Chromium and Manganese as a magnetic dopant in topological thin films.
Structural and Magnetic properties of Ni nanoferrites doped with rare earth and transition metals Introduction Experimental Size dependence of the magnetic properties of NiFe2O4 nanoparticles The structural, transport, and magnetic properties of a manganese-perovskite system R 1−x A x MnO 3 (A=alkaline-earth or alkali atom) are strongly influenced by two features of the MnO 3 array: the orbital degeneracy of the octahedral-site, high-spin Mn(III): d 4 configuration and the possibility of a transition from localized to itinerant electronic behavior of the σ-bonding d electrons with increasing t Cited by: A systematic study of structural, magnetic and electrical properties of perovskites.
Journal of Physics: Condensed Matter8 (40), DOI: //8/40/ D. GIAQUINTA, H.-C. ZUR LOYE. ChemInform Abstract: Structural Predictions in the ABO3 Phase by: Rietveld analysis of the powder XRD data and TEM studies confirm that STMO is a disordered perovskite with Pm-3m space group in which titanium and manganese ions Cited by: 3.
Magnetic measurements were carried out on large aligned single crystals, and a very large magnetic anisotropy in the magnetic susceptibility, persisting up to room temperature, was observed. Ba8CoRh6O21 single crystals, prepared from a potassium carbonate flux, represent the first structurally characterized m = 5, n = 3 member of the A3n+3mA‘nB3m+nO9m+6n family of 2H-hexagonal perovskite related by: In general, magnetic properties of bulk magnetic materials are independent of the humidity of the environment.
To obtain a magnetic material that Cited by: Structural and magnetic studies of manganese perovskite-related materials Author: Gillie, Lisa Jane. ISNI: Awarding Body: University of Birmingham Current Institution: University of Birmingham Date of Award: Availability of Full Text.
diffraction studies have shown that both CaMn and CaMn order at TN - K, but possess unique yet related magnetic structures.
CaMn orders into a simple G type magnetic structure, as observed in the compound CaMn The slightly more doped sample CaMn, on the other hand, orders into a magnetic structure related to the GAuthor: Ryan Christopher Wiebe.
The modification of structural and magnetic properties of B-site ordered double perovskite oxides, caused by a change of B-site cations, is of great interest, and of use when trying to understand the mechanism of e.g.
colossal magnetoresistance. Depending on their valences and relative radii the B-site is often occupied by transition metals, and can accommodate two different metal by: ordering of PCTO. The study is complemented with magnetic and calorimetric measurements, which are discussed in the light of subtle structural peculiarities.
Additional consideration of similarities and differences between the structures of Co-based multiferroic perovskites of varying chemical compositions may help to determine the factors responsible for obverved dielectric and magnetic properties in these materials.
The structural and electronic transport properties have been predicted for La 1−x Ce x MnO 3. Generally, perovskites crystallize in orthorhombic structure, but many studies Cited by: The main purpose of this book is to introduce the phenomenon and physics of complex magnetism (phase separation, spin glass, frustrations, etc.) in perovskite manganites and cobaltites via an experimental approach.
The book is organized into four chapters; Chap. 1 gives a brief introduction of various interesting phenomena in magnetic by: 7.
Colossal magnetoresistive materials are perovskite-related mixed-valent (Mn3+/Mn4+) manganese oxides that exhibit both spontaneous (at a Curie transition) and magnetic field-induced insulator.
Here, we present a comprehensive study that encompasses changes within the crystal and magnetic structure in the brownmillerite-type phase Ca2Fe2O5 induced by the substitution of Fe3+ with Ga3. Lanthanum manganite (LaMnO 3) crystallizes into perovskite structure and is known for its interesting electric, magnetic and structural properties   ; therefore, its in-depth study.
Effect of pH and annealing temperatures on structural, magnetic, electrical, dielectric and adsorption properties of manganese ferrite nano particles August Materials Science in Semiconductor. Later, inKuang et al.  detailed determined the crystal structure of Ba 3 YTi 2 Owhich summarized that Ba 3 YTi 2 O exhibits a hexagonal layer perovskite-related structure.
Crystal structure and properties of barium nickel sulfide, a square-pyramidal nickel(II) compound. A layered Oxysulfide with a New Perovskite-Related Manganese Oxide Fragment. Chemistry of Materials20 (2), DOI: /cm Transport and Magnetic Studies of BaCo 1- Cited by: Abstract.
The study of the magnetic properties of mixed valence manganese perovskites dates back almost 50 years [1–2]. The existence of competitive ferromagnetic (FM) double-exchange  and antiferromagnetic (AF) superexchange interactions, which are very sensitive to the structural parameters and the degree of doping, results in a very rich magnetic phase diagram for this type of Author: I.
Panagiotopoulos, M. Pissas, C. Christides, G. Kallias, V. Psycharis, N. Moutis, D. Niarchos.We use a combination of bulk-property studies (dielectric, magnetic and so on) coupled with detailed structural studies using neutron, X-ray and electron diffraction, to try to make the link between structure and function in such materials.
Once this relationship is understood, new materials can be 'designed', with new and improved properties.