Browsing Institutt for materialteknologi by Title
Now showing items 1348-1367 of 2508
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Local and average structure of Mn- and La-substituted BiFeO3
(Journal article; Peer reviewed, 2017)The local and average structure of solid solutions of the multiferroic perovskite BiFeO3 is investigated by synchrotron X-ray diffraction (XRD) and electron density functional theory (DFT) calculations. The average ... -
Local control of improper ferroelectric domains in YMnO 3
(Peer reviewed; Journal article, 2020)Improper ferroelectrics are described by two order parameters: a primary one, driving a transition to long-range distortive, magnetic, or otherwise nonelectric order, and the electric polarization, which is induced by the ... -
Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe
(Journal article; Peer reviewed, 2016)Chiral magnetic interactions induce complex spin textures including helical and conical spin spirals, as well as particle-like objects such as magnetic skyrmions and merons. These spin textures are the basis for innovative ... -
Local electric-field control of multiferroic spin-spiral domains in TbMnO3
(Journal article, 2020)Spin-spiral multiferroics exhibit a magnetoelectric coupling effects, leading to the formation of hybrid domains with inseparably entangled ferroelectric and antiferromagnetic order parameters. Due to this strong magnetoelectric ... -
Local structural coupling of A- and B-site disorder in perovskite bismuth-based piezoelectrics
(Journal article; Peer reviewed, 2019)The local and average structure of (1-x)Bi0.5K0.5TiO3-xBiFeO3 (BKT-xBFO, x = 0.25 and 0.5) solid solutions are studied by synchrotron X-ray total scattering from ambient to 773 K. Pair distribution functions (PDFs) demonstrate ... -
Local Structure of Disordered Bi0.5K0.5TiO3 Investigated by Pair Distribution Function Analysis and First-Principles Calculations
(Journal article; Peer reviewed, 2017)We investigate A-site cation ordering in the ferroelectric perovskite Bi0.5K0.5TiO3 (BKT) by density functional theory (DFT) calculations and synchrotron X-ray total scattering. Using BKT as a prototypical lead-free ... -
Local surface crystal structure fluctuation on Li, Na and Mg metal anodes
(Peer reviewed; Journal article, 2022)Dendrite formation occurs on Li, Na, and Mg metal anodes in rechargeable batteries, and is a safety challenge, as well as a limiting factor for increasing energy- and power density. However, the behaviour of the dendrites ... -
Long Term Degradation of Polymers: Molecular and Macroscopic Effects
(Master thesis, 2013)Hydrolytic degradation in water at elevated temperatures is one of the most important reasons for failure in polymeric materials in offshore flexible risers. In this thesis the ageing of polyamide 11 (PA11) in deoxygenated ... -
Long term stability testing of oxide unicouple thermoelectric modules
(Journal article; Peer reviewed, 2019)Thermoelectric devices based on oxides are good candidates for energy harvesting technologies for use in aggressive conditions where the materials should withstand high temperatures and corrosive environments over prolonged ... -
Long-Life, Low-Maintenance Coating Systems
(Journal article; Peer reviewed, 2012)A coating system with low maintenance will often give lower life-cycle costs, in spite of higher costs in the new construction phase. The Public Roads Administration in Norway has been using coating systems consisting of ... -
Long-term stability of screen-printed pseudo-reference electrodes for electrochemical biosensors
(Journal article; Peer reviewed, 2018)Pseudo reference electrodes forms an essential part of electrochemical transducers, where they are used to maintain a reference potential for the system. Yet, little is known about their long-term stability, and any drift ... -
The (love & hate) role of entropy in process metallurgy
(Journal article, 2019)Abstract. Process metallurgy is the basis for the production, refining and recycling of metals and is based on knowledge of transport phenomena, thermodynamics and reaction kinetics, and of their interaction in high ... -
Low Cycle Fatigue of Extruded and Cast Aluminium Alloy 6082
(Master thesis, 2017)The objective of the research is to determine the differences between the low cycle fatigue properties of an extruded and cast treatments of AA6082-T6 used as the forging billet in the production of a car suspension arm. ... -
Low-energy properties of electrons and holes in CuFeS2
(Peer reviewed; Journal article, 2022)The antiferromagnetic semiconductor CuFeS2 belongs to a magnetic symmetry class that is of interest for spintronics applications. In addition, its crystal lattice is compatible with Si, making it possible to integrate it ... -
Low-temperature microwave synthesis of ternary-layered 2D BiOCl crystals in a confined-space
(Master thesis, 2022)Økningen i både utslipp og miljøgifter har vært en direkte konsekvens av den økende graden av urbanisering og industrialisering i verden. Nedbryting av disse forurensingene kan oppnås ved å bruke fotokatalysatorer. En ... -
Low-Temperature Plasma-Enhanced Atomic Layer Deposition of SiO2 Using Carbon Dioxide
(Peer reviewed; Journal article, 2019)In this work, we report the successful growth of high-quality SiO2 films by low-temperature plasma-enhanced atomic layer deposition using an oxidant which is compatible with moisture/oxygen sensitive materials. The SiO2 ... -
Luminescent Eu3+-doped NaLa(WO4)(MoO4) and Ba2CaMoO6 prepared by the modified Pechini method
(Journal article; Peer reviewed, 2016)Modified Pechini synthesis routes were developed for synthesis of the novel red phosphor materials NaLa(WO4)(MoO4):Eu3+ and Ba2CaMoO6:Eu3+. Phase pure NaLa(WO4)(MoO4):Eu3+ was obtained at calcination temperatures ≥600 °C ... -
Luminescent silica-based nanocomposites for detection of liquid organic compounds
(Doctoral theses at NTNU;2021:307, Doctoral thesis, 2021)The main aim of this thesis is to prove a concept of a novel detection method for liquid organic compounds (LOCs) based on luminescent nanoparticles (NPs) that can be used in oil-field applications. Before starting an ... -
A machine learning enabled ultra-fine grain design strategy of Mg–Mn-based alloys
(Peer reviewed; Journal article, 2023)Grain size is the critical characteristic of ultra-fine grain Magnesium (Mg), which is a concrete representation of the whole heat deformation procedure. In this paper, a design strategy was proposed to quantitatively ... -
Machine Learning for Predicting Polarization Curves and Their Features
(Master thesis, 2023)Vanligvis er viktige elektrokjemiske parametere hentet fra empiriske data. Dette skyldes i stor grad at analytiske modeller, som ulike former av Butler-Volmer-ligningen, ofte kommer til kort i nøyaktig å fange de viktige ...