Background and activities
Jostein Grepstad (1951) is Professor at Department of Electronics and Telecommunications, where he is part of the Nanoelectronics and Photonics research group. Professor Grepstad has both his MSc (1975) and a PhD (1982) from Department of Physics, NTH.
Area of expertise
His present research is focused on studies of epitaxial oxide thin films and heterostructures, incl. high-Tc superconductors, ferroelectrics, and ferro-/antiferromagnetic oxides, with special emphasis on domain formation and magnetic coupling in FM/AFM nanostructures. He also has extensive experience in surface and interface analysis with electron spectroscopy and synchrotron radiation techniques.
Recent work experience
- 2010-2011 Visiting scholar, Dept. of Materials Science & Engineering, UC Berkeley, USA
- 2003-2004 Visiting scholar, Dept. of Materials Science & Engineering, UC Berkeley, USA
- 1995-1996 Visiting scholar, Stanford Synchrotron Radiation Laboratory (SSRL), Stanford University, USA
- 1992- Professor, Dept. of Electronics and Telecommunications, NTNU
- 1989-1991 Associate Professor, Dept. of Physical Electronics, NTH
- 1987-1988 Visiting scholar (MER invitè), Dept. of Condensed Matter Physics, University of Geneva, Switzerland
- Developed and taught several courses at Dept. of Electronics and Telecom-munications, NTNU (formerly Dept. of Physical Electronics, NTH) on semiconductor physics, solid state electronics, photonic devices, superconductivity, nanoimprint lithography (NIL)
- Principal thesis advisor of 8 PhDs (graduated)
- Diploma thesis advisor of 1- 4 MSc students annually in EE/Applied Physics
07-12/2008, 2012-present, Member, Interfaculty committee for MSc studies in nanotechnology
- 2012- Group Leader, the Royal Norwegian Society of Sciences and Letters (DKNVS); Natural Sciences, Gr. VIII Technology
- 2005-2012, Chair, Faculty board of election officials
- 2004-2013, Board member, NTNU NanoLab
- 2002-2003, 2004-2012 Board member, NTNU thematic research area “Materials”
- 2002-2010, Member (NTNU representative), SINTEF council
- 2002-2003, 2004-2009 Vice Dean (research), Faculty of Information Technology, Mathematics and Electrical engineering
- 2003-2008 Board member, Centre of Excellence on “Quantifiable Quality of Service in Communication Systems”
Professional society memberships
- The Royal Norwegian Society of Sciences and Letters (DKNVS)
- The Norwegian Academy of Technical Sciences (NTVA)
- Norwegian Physical Society (NFS)
- American Physical Society (APS)
- American Vacuum Society (AVS)
- Materials Research Society (MRS)
- Institute of Electrical and Electronic Engineering (IEEE)
Scientific, academic and artistic work
A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database
- (2021) Anisotropy and domain formation in a dipolar magnetic metamaterial. Applied Physics Letters. vol. 118.
- (2021) Effects of array shape and disk ellipticity in dipolar-coupled magnetic metamaterials. Physical review B (PRB). vol. 104 (13).
- (2020) Direct imaging of long-range ferromagnetic and antiferromagnetic order in a dipolar metamaterial. Physical Review Research (PRResearch). vol. 2 (1).
- (2020) Enhanced magnetic signal along edges of embedded epitaxial La0.7Sr0.3MnO3 nanostructures. Journal of Magnetism and Magnetic Materials. vol. 521 (1).
- (2020) Exchange explosions of topological edge defects in a square micromagnet. Physical review B (PRB). vol. 101 (1).
- (2019) Shape-imposed anisotropy in antiferromagnetic complex oxide nanostructures. Applied Physics Letters. vol. 115 (11).
- (2019) Neel vector reorientation in ferromagnetic/antiferromagnetic complex oxide nanostructures. Applied Physics Letters. vol. 114 (19).
- (2019) Effects of lattice geometry on the dynamic properties of dipolar-coupled magnetic nanodisk arrays. Physical review B (PRB). vol. 99 (064418).
- (2018) Magnetic domain formation in ultrathin complex oxide ferromagnetic/antiferromagnetic bilayers. Applied Physics Letters. vol. 113 (13).
- (2018) Interplay between bulk and edge-bound topological defects in a square micromagnet. Applied Physics Letters. vol. 112 (4).
- (2017) Effect of surface roughness, chemical composition, and native oxide crystallinity on the orientation of self-assembled GaN nanowires on Ti foils. Nanotechnology. vol. 28 (42).
- (2017) Magnetic domain configuration of (111)-oriented LaFeO3 epitaxial thin films. APL Materials. vol. 5 (8).
- (2017) Temperature and Orientation Dependent Exchange Coupling in Epitaxial Oxide Micromagnets. PHYSICAL REVIEW MATERIALS. vol. 1.
- (2017) Tailoring the magnetic order in a supermagnetic metamaterial. AIP Advances. vol. 7 (5).
- (2016) Concurrent magnetic and structural reconstructions at the interface of (111)-oriented L a0.7 S r0.3Mn O3/LaFe O3. Physical Review B. Condensed Matter and Materials Physics. vol. 94 (20).
- (2016) Tailoring Spin Textures in Complex Oxide Micromagnets. ACS Nano. vol. 10 (9).
- (2015) Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets. Physical Review B. Condensed Matter and Materials Physics. vol. 92 (9).
- (2015) Crystalline symmetry controlled magnetic switching in epitaxial (111) La0.7Sr0.3MnO3 thin films. APL Materials. vol. 3 (6).
- (2013) In-plane structural order of domain engineered La0.7Sr0.3MnO3 thin films. Philosophical Magazine. vol. 93 (13).
- (2013) Surface stability of epitaxial La0.7Sr0.3MnO3 thin films on (111)-oriented SrTiO3. Journal of Applied Physics. vol. 113 (18).