Gast ::
| Hauptseite > Publikationsdatenbank > Spin-orbit torques from first principles: Collinear magnets, noncollinear magnets, temperaturedependence > print |
| Hauptseite > Publikationsdatenbank > Spin-orbit torques from first principles: Collinear magnets, noncollinear magnets, temperaturedependence > print |
| 001 | 906128 | ||
| 005 | 20220226143433.0 | ||
| 037 | _ | _ | |a FZJ-2022-01244 |
| 100 | 1 | _ | |a Freimuth, Frank |0 P:(DE-Juel1)130643 |b 0 |e Corresponding author |
| 111 | 2 | _ | |a Group Seminar |c Martin-Luther-Universität Halle-Wittenberg |d 2022-02-22 - |w Germany |
| 245 | _ | _ | |a Spin-orbit torques from first principles: Collinear magnets, noncollinear magnets, temperaturedependence |f 2022-02-02 - |
| 260 | _ | _ | |c 2022 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
| 336 | 7 | _ | |a Other |2 DataCite |
| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 336 | 7 | _ | |a LECTURE_SPEECH |2 ORCID |
| 336 | 7 | _ | |a Talk (non-conference) |b talk |m talk |0 PUB:(DE-HGF)31 |s 1645798908_31247 |2 PUB:(DE-HGF) |x Invited |
| 336 | 7 | _ | |a Other |2 DINI |
| 520 | _ | _ | |a Spin-orbit torques (SOTs) in magnetic bilayers composed of a 5d transition metal layer and aferromagnetic layer can serve as a competitive alternative to the Slonczewski spin-transfer torque inspin-valves and magnetic tunnel junctions in order to realize MRAM devices. Based on our first -principles approach to compute the SOT, we will first discuss the SOT in Co/Pt and Mn/W magneticbilayers [1,2]. A particular focus will be on the role of the spin-currents that contribute to these torques.We will show how the understanding of the SOT in these ferromagnetic bilayers may be transferred tothe SOT in antiferromagnetic bilayers such as FeRh/W[3]. A necessity to obtain the SOT is thebreaking of space inversion symmetry. While magnetic bilayers such as Co/Pt and Mn/W exhibitstructural breaking of inversion symmetry, half Heusler compounds such as PtMnSb display brokeninversion symmetry in the bulk. We will show that the SOT in half Heuslers may reach magnitudescomparable to magnetic bilayers and is very sensitive to strain [4]. Next, we will discuss that thecombination of structural inversion asymmetry and noncollinear magnetism leads to additionalmechanisms of the SOT. In particular, we will discuss Co/Cu/Co trilayers, where spin currentsgenerated by in-plane current at one FM/NM interface can be used to switch the other FM [5]. Despitethe absence of heavy metals with strong spin-orbit coupling the SOTs in Co/Cu/Co trilayers are sizable.The SOT in the top FM can be tuned by the magnetization direction of the bottom FM. We will showthat in noncollinear magnets SOT and current-induced Dzyaloshinskii-Moriya interaction areintertwined, such that both effects need to be considered at the same time in order to obtain results thatsatisfy the Onsager-reciprocity relations [6]. Finally, we will discuss the temperature dependence ofSOTs found in experiments, which is often not yet well understood by the theoretical models. We willdiscuss our formalism development for the calculation of the magnonic contribution to the SOT andpresent results for this magnonic SOT in the Rashba model [7].[1] F. Freimuth et al., PRB 92, 064415 (2015)[2] F. Freimuth et al., PRB 90, 174423 (2014)[3] F. Freimuth et al., https://arxiv.org/abs/2102.10598[4] F. Freimuth et al., PRB 103, 224414 (2021)[5] F. Freimuth et al., PRB 98, 024419 (2018)[6] F. Freimuth et al., PRB 102, 245411 (2020)[7] F. Freimuth et al., PRB 104, 094434 (2021) |
| 536 | _ | _ | |a 5211 - Topological Matter (POF4-521) |0 G:(DE-HGF)POF4-5211 |c POF4-521 |f POF IV |x 0 |
| 909 | C | O | |o oai:juser.fz-juelich.de:906128 |p VDB |
| 910 | 1 | _ | |a Forschungszentrum Jülich |0 I:(DE-588b)5008462-8 |k FZJ |b 0 |6 P:(DE-Juel1)130643 |
| 913 | 1 | _ | |a DE-HGF |b Key Technologies |l Natural, Artificial and Cognitive Information Processing |1 G:(DE-HGF)POF4-520 |0 G:(DE-HGF)POF4-521 |3 G:(DE-HGF)POF4 |2 G:(DE-HGF)POF4-500 |4 G:(DE-HGF)POF |v Quantum Materials |9 G:(DE-HGF)POF4-5211 |x 0 |
| 914 | 1 | _ | |y 2022 |
| 920 | 1 | _ | |0 I:(DE-Juel1)IAS-1-20090406 |k IAS-1 |l Quanten-Theorie der Materialien |x 0 |
| 920 | 1 | _ | |0 I:(DE-Juel1)PGI-1-20110106 |k PGI-1 |l Quanten-Theorie der Materialien |x 1 |
| 920 | 1 | _ | |0 I:(DE-82)080009_20140620 |k JARA-FIT |l JARA-FIT |x 2 |
| 920 | 1 | _ | |0 I:(DE-82)080012_20140620 |k JARA-HPC |l JARA - HPC |x 3 |
| 980 | _ | _ | |a talk |
| 980 | _ | _ | |a VDB |
| 980 | _ | _ | |a I:(DE-Juel1)IAS-1-20090406 |
| 980 | _ | _ | |a I:(DE-Juel1)PGI-1-20110106 |
| 980 | _ | _ | |a I:(DE-82)080009_20140620 |
| 980 | _ | _ | |a I:(DE-82)080012_20140620 |
| 980 | _ | _ | |a UNRESTRICTED |
| Library | Collection | CLSMajor | CLSMinor | Language | Author |
|---|