Browsing NTNU Open by Author "Folven, Erik"
Now showing items 21-40 of 43
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Investigating domains in modified square artificial spin ice using magnetic force microscopy and simulations
Holm, Gunvor (Master thesis, 2023)Kunstige spinn-is er magnetiske metamaterialer med unike emergente egenskaper, som gjør de til gode kandidater for nye typer datamaskiner. Å forstå mer av oppførselen til disse materialene er essensielt for å utvikle de ... -
Investigating hysteresis in deformed 45° pinwheel artificial spin ices by magnetic force microscopy
Breivik, Ida (Master thesis, 2022)Kunstig spinnis er magnetiske metamaterialer bestående av vekselvirkende nanomagneter som viser stort potensial for bruk i fremtidens dataanalyseteknologier. Nanomagnetene er plassert i mønstre som introduserer geometriske ... -
Investigating the Magnetic Characteristics of Oxidized Ni80Fe20 Structures and the Integrity of Al Capping Layers Used as an Oxidation Barrier
Lyng-Jørgensen, Jonas (Master thesis, 2022)Kunstige spinnis er metamaterialer bestående av nanoskala ferromagneter satt sammen i ulike geometrier for å produsere eksotiske magnetiske egenskaper og representerer potensielle kandidater for bruk i lavenergi ... -
Large Area Patterning of Embedded Magnetic Nanostructures in Complex Oxide Thin Films
Mellbye, Aksel Skauge (Master thesis, 2015)Complex oxide materials exhibit a wide range of functional properties, making them interesting for future use in electronic and spintronic devices. Through nanopatterning of thin film structures, magnetic shape effects can ... -
Local magnetic field device forartificial spin ice
Rougseth, Svein Kristian (Master thesis, 2021)En kunstig spinn-is er en er et system som består av en sampling koblede dipolmagneter. Individuelt har magnetene en helt vanlig oppførsel, men kollektivt utøver de en rekke komplekse og interessante oppførsler. I det ... -
Magnetic domain configuration of (111)-oriented LaFeO3 epitaxial thin films
Hallsteinsen, Ingrid; Moreau, Magnus; Chopdekar, R.V.; Christiansen, Emil; Nord, Magnus Kristofer; Vullum, Per Erik; Grepstad, Jostein; Holmestad, Randi; Selbach, Sverre Magnus; Scholl, A; Arenholz, E; Folven, Erik; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2017)In antiferromagnetic spintronics control of the domains and corresponding spin axis orientation is crucial for devices. Here we investigate the antiferromagnetic axis in (111)-oriented LaFeO3/SrTiO3, which is coupled to ... -
Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers
Bang, Ambjørn Dahle; Olsen, Fredrik Kjemperud; Slöetjes, Samuel Dingeman; Scholl, Andreas; Retterer, Scott T.; Vaz, Carlos; Tybell, Per Thomas Martin; Folven, Erik; Grepstad, Jostein (Journal article; Peer reviewed, 2018)In this study, we report on the magnetic domain formation in ultrathin blanket films and patterned micro- and nanostructures of ferromagnetic (FM) La0.7Sr0.3MnO3 single-layers and antiferromagnetic (AF)/ferromagnetic ... -
Magnetic Force Microscopy and Micromagnetic Simulations of Nanoscale Magnetic Structures and Modified Artificial Spin Ices
Langørgen, Amanda (Master thesis, 2020)Kunstige spinnis betegner magnetiske metamaterialer som består av koblede nanomagneter plassert i et gitter. De utgjør interessante system fordi de gir mulighet til å skreddersy magnetiske egenskaper. Videre har de et ... -
Magnetic Force Microscopy of Magnetic Nanodisk Arrays at Room Temperature
Wang, Thorstein (Master thesis, 2019)De senere årene har verden opplevd en eksponentiell økning i energiforbruket relatert til informasjonsteknologi og data. Samtidig er det et intenst behov for å redusere verdenssamfunnets samlede energiforbruk. Dette gjør ... -
Magnetic Ordering in Artificial Spin Ice: Towards Tailormade Magnetic Metamaterials
Fjon, Håvard Katle (Master thesis, 2021)CMOS-teknologi nærmer seg grensen av Moore's lov, og stadig mer oppmerksomhet blir rettet mot potensielle materialer til bruk i ukonvensjonelle datamaskiner. Utvikling i nanofabrikkeringsteknikker har gitt økt fokus og mer ... -
Magnetic vortex dynamics in interacting micromagnets
Feiring, Mira Thoen (Master thesis, 2015)We have studied magnetic vortex oscillations in circular LSMO (lanthanum strontium manganite) disks by micromagnetic simulations. The simulations were performed using the MuMax3 software developed at the DyNaMat group ... -
Micromagnetic modelling and magnetic force microscopy of supermagnetism in patterned nanomagnetic arrays
Strømberg, Anders (Master thesis, 2018)Advanced magnetic materials have played an important role in, and continue to pave the way for, innovative technological advancements. Modern day computers, sensors, and biomedicine would not be possible without the use ... -
Micromagnetic Modelling of Thermally Induced Errors in Nanomagnetic Logic
Lee, Hanna Heggheim (Master thesis, 2018)Micromagnetic simulations have been used to study nanomagnet structures of La0.7Sr0.3MnO3 (LSMO) with the aim of use in nanomagnetic logic (NML). Studying the success rate of signal propagation in chains of nanomagnets has ... -
Neel vector reorientation in ferromagnetic/antiferromagnetic complex oxide nanostructures
Bang, Ambjørn Dahle; Hallsteinsen, Ingrid; Olsen, Fredrik Kjemperud; Slöetjes, Samuel Dingeman; Retterer, Scott T; Scholl, Andreas; Arenholz, Elke; Folven, Erik; Grepstad, Jostein (Journal article; Peer reviewed, 2019)In this study, we report on a temperature-driven antiferromagnetic (AF) spin reorientation transition in micro- and nanostructures of AF/ferromagnetic (FM) LaFeO3/La0.7Sr0.3MnO3 thin film bilayers. Using a combination of ... -
Patterned nanomagnets - magnetic metamaterials and vortex dynamics
Digernes, Einar Standal (Doctoral theses at NTNU;2021:101, Doctoral thesis, 2021)Sustaining the rapid development of information technology will eventually require new types of devices that are smaller, faster and more power efficient. Although the transistor is, and will continue to be, tremendously ... -
Patterning and Characterization of Free-Standing Nanostructures in Magnetic Oxide Thin Films
Urnes, Marianne (Master thesis, 2016)Free-standing nanostructures consisting of lines measuring 650 nm wide and 4 mm long were produced over an area of 4x4 mm using electron beam lithography (EBL). The magnetic properties of the resulting structures was ... -
Shape-imposed anisotropy in antiferromagnetic complex oxide nanostructures
Bang, Ambjørn Dahle; Hallsteinsen, Ingrid; Chopdekar, Rajesh V.; Olsen, Fredrik Kjemperud; Slöetjes, Samuel Dingeman; Kjærnes, Kristoffer; Arenholz, Elke; Folven, Erik; Grepstad, Jostein (Journal article; Peer reviewed, 2019)In this study, we report on a shape-imposed magnetic anisotropy in micro- and nanostructures defined in antiferromagnetic (AF) LaFeO3 (LFO) thin films. Two distinct types of structures are investigated: embedded magnets ... -
Simulation, design and realisation of on-chip microheaters for artificial spin ice systems
Strømholt, Rune (Master thesis, 2021)Kunstig spinn-is systemer er nye og spennende materialer innen ukonvensjonell dataprossesering. Det er av den grunn nødvendig å ha lette og praktiske metoder for å undersøke strukturene i forskjellige system, slik som ved ... -
Surface Roughness in Metallic Thin Films and its Effects on the Magnetic Properties of Permalloy Thin Films
Årdal, Håvard Mattias (Master thesis, 2022)Ferromagnetisk permalloy (Py) tynnfilmer ser omfattende bruk i en rekke applikasjoner, som for eksempel i magnetisk datalagring og kunstig spinn-is systemer. Etter hvert som dimensjonene på enhetene blir mindre, blir også ... -
Tailoring the magnetic order in a supermagnetic metamaterial
Slöetjes, Samuel Dingeman; Urdahl, Hans Henrik; Grepstad, Jostein; Folven, Erik (Journal article; Peer reviewed, 2017)The emergent magnetism in close-packed assemblies of interacting superparamagnetic particles is commonly referred to as supermagnetism. The magnetic characteristics of such systems are determined by the dipolar coupling ...