Blar i Institutt for elektroniske systemer på forfatter "Hallsteinsen, Ingrid"
-
Coexisting spin-flop coupling and exchange bias in LaFeO3/La0.7Sr0.3MnO3 heterostructures
Olsen, Fredrik Kjemperud; Hallsteinsen, Ingrid; Arenholtz, Elke; Tybell, Per Thomas Martin; Folven, Erik (Journal article; Peer reviewed, 2019)Exchange bias occurs in field-cooled antiferromagnet/ferromagnet systems and can most often be explained in terms of uncompensated magnetic moments at the interface that are pinned in their orientation during field cooling. ... -
Controlling spin current polarization through non-collinear antiferromagnetism
Nan, Tianxiang; Quintela, Camilo X.; Irwin, Julian; Gurung, Gautam; Shao, Ding-Fu; Gibbons, Jonathan D.; Campbell, Neil G.; Song, Kuyngjun; Choi, Seunghel Y.; Guo, Lu; Johnson, Roger D.; Manuel, Pascal; Chopdekar, Rajesh V.; Hallsteinsen, Ingrid; Tybell, Per Thomas Martin; Ryan, Philip J.; Kim, Jinwoong Woo; Choi, Yongseong; Radaelli, Paolo G.; Ralph, Daniel C.; Tsymbal, Evgeny Yu.; Rzchowski, Mark S.; Eom, Chang Beom (Peer reviewed; Journal article, 2020)The interconversion of charge and spin currents via spin-Hall effect is essential for spintronics. Energy-efficient and deterministic switching of magnetization can be achieved when spin polarizations of these spin currents ... -
Crystalline symmetry controlled magnetic switching in epitaxial (111) La0.7Sr0.3MnO3 thin films
Hallsteinsen, Ingrid; Folven, Erik; Olsen, Fredrik Kjemperud; Chopdekar, R.V.; Rzchowski, M; Eom, C.B.; Grepstad, Jostein; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2015)Mixed-valence manganite thin films are attractive for spintronic devices. Crystalline orientation is a promising route to tailor switching mechanisms, as magnetization reversal depends on the magnetic anisotropy. Here, ... -
Effect of (111)-oriented strain on the structure and magnetic properties of La2/3Sr1/3MnO3 thin films
Bolstad, Torstein; Lysne, Erik Nikolai; Hallsteinsen, Ingrid; Arenholz, E; Østerberg, Ulf Lennart; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2018)Using strain, i.e. subtle changes in lattice constant in a thin film induced by the underlying substrate, opens up intriguing new ways to control material properties. We present a study of the effects of strain on structural ... -
Effect of polar (111)-oriented SrTiO3 on initial perovskite growth
Hallsteinsen, Ingrid; Nord, Magnus Kristofer; Bolstad, Torstein; Vullum, Per Erik; Boschker, Jos Emiel; Longo, Paulo; Takahashi, Ryota; Holmestad, Randi; Lippmaa, Mikk; Tybell, Per Thomas Martin (Journal article, 2016)In crystalline thin film growth a prerequisite is substrate surfaces with a stable and uniform structure and chemical composition. Various substrate treatments were used to obtain atomically smooth, step-and-terrace ... -
Effects of field annealing on MnN/CoFeB exchange bias systems
Quarterman, P; Hallsteinsen, Ingrid; Dunz, Mareike; Meinert, Markus; Arenholz, Elke; Borchers, Julie; Grutter, Alexander (Peer reviewed; Journal article, 2019)We report the effects of nitrogen diffusion on exchange bias in MnN/CoFeB heterostructures as a function of MnN thickness and field-annealing temperature. We find that competing effects occur in which high-temperature ... -
Geometrical lattice engineering of oxide interfaces
Hallsteinsen, Ingrid (Doctoral theses at NTNU;2017:45, Doctoral thesis, 2017) -
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 ... -
Magneto-dynamic properties of complex oxide—La0.7Sr0.3MnO3/SrTiO3— heterostructure interface
Singh, Suraj Kumar; Bolstad, Torstein; Hallsteinsen, Ingrid; Tybell, Per Thomas Martin; Wahlström, Erik (Journal article; Peer reviewed, 2019)We have studied the interface magnetodynamic properties of La0.7Sr0.3MnO3/SrTiO3 (111) heterostructures by Ferromagnetic resonance spectroscopy (FMR). In addition to the bulk FMR mode, the measurements indicate a mode ... -
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 ... -
Record thermopower found in an IrMn-based spintronic stack
Tu, Sa; Ziman, Timothy; Yu, Guoqiang; Wan, Caihua; Hu, Junfeng; Wu, Hao; Wang, Hanchen; Liu, Mengchao; Liu, Chuanpu; Guo, Chenyang; Zhang, Jianyu; Cabero Z., Marco A.; Zhang, Youguang; Gao, Peng; Liu, Song; Yu, Dapeng; Han, Xiufeng; Hallsteinsen, Ingrid; Gilbert, Dustin A.; Matsuo, Mamoru; Ohnuma, Yuichi; Wölfle, Peter; Wang, Kang L.; Ansermet, Jean-Philippe; Maekawa, Sadamichi; Yu, Haiming (Peer reviewed; Journal article, 2020)The Seebeck effect converts thermal gradients into electricity. As an approach to power technologies in the current Internet-of-Things era, on-chip energy harvesting is highly attractive, and to be effective, demands thin ... -
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 ... -
Structural investigation of epitaxial LaFeO3 thin films on (111) oriented SrTiO3 by transmission electron microscopy
Christiansen, Emil; Nord, Magnus Kristofer; Hallsteinsen, Ingrid; Vullum, Per Erik; Tybell, Per Thomas Martin; Holmestad, Randi (Journal article; Peer reviewed, 2015)We report on structural domains in LaFeO3 epitaxial thin films on (111) oriented SrTiO3 observed by transmission electron microscopy using low magnification dark field imaging and high resolution transmission electron ... -
The role of antiferromagnetic spin axis on magnetic reconstructions at the (111)-oriented La0.7Sr0.3MnO3/ LaFeO3 interface
Hallsteinsen, Ingrid; Grutter, Alexander; Moreau, Magnus; Slöetjes, Samuel Dingeman; Kjærnes, Kristoffer; Arenholz, elke; Tybell, Per Thomas Martin (Journal article; Peer reviewed, 2018)Engineering of emergent properties at oxide interfaces is an exciting route towards realizing oxide electronics. Such properties are often the result of a balance between cooperating and competing mechanisms in the materials ... -
Uniaxial Néel vector control in perovskite oxide thin films by anisotropic strain engineering
Kjærnes, Kristoffer; Hallsteinsen, Ingrid; Chopdekar, R. V.; Moreau, Magnus; Bolstad, Torstein; Svenum, Ingeborg-Helene; Selbach, Sverre Magnus; Tybell, Per Thomas Martin (Peer reviewed; Journal article, 2021)Antiferromagnetic (AF) thin films typically exhibit a multidomain state, and control of the AF Néel vector is challenging, as AF materials are robust to magnetic perturbations. In this paper, uniaxial Néel vector control ...