{"id":129,"date":"2019-05-27T09:07:16","date_gmt":"2019-05-27T07:07:16","guid":{"rendered":"https:\/\/magnefi.c2n.u-psud.fr\/?page_id=129"},"modified":"2020-06-23T11:51:06","modified_gmt":"2020-06-23T09:51:06","slug":"usal-modelling-magnetization-dynamics-in-piezoelectric-magnetic-devices","status":"publish","type":"page","link":"https:\/\/magnefi.c2n.u-psud.fr\/?page_id=129","title":{"rendered":"Usal: Modelling magnetization dynamics in piezoelectric\/magnetic devices"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

Host:<\/strong> University\nof Salamanca<\/p>\n\n\n\n

Location:<\/strong> Salamanca,\nSpain<\/p>\n\n\n\n

Supervisor:<\/strong> Luis Lopez-Diaz, Eduardo Martinez<\/a> <\/p>\n\n\n\n

Scientific project:<\/strong> The PhD project is focused on studying the effect of strain on the magnetic properties of different materials, nanostructures and devices. The work to be carried out is theoretical and computational, although it will be done in close collaboration with the network partners doing experimental work in this topic. As such, it will require visiting their labs to familiarize with the experiments techniques, help in the interpretation of the data and in the design of new devices.<\/p>\n\n\n\n

A\nsignificant part of the effort will the devoted to the development and\nnumerical implementation of a mesoscopic model that couples micromagnetics,\nelastodynamics and electrostatics self-consistently [1]. This will be carried\nout starting from some preliminar work done by the group in this direction and\nit will require extensive use of COMSOL Multiphysics for both code validation\nand some large scale electro-mechanical simulations. Once tested and optimized,\nthe code will be used to investigate how voltage-induced strain can be used to\nmanipulate domain walls efficiently in different ways: reversible pinning\/depinning\nwith voltage pulses, channelling their motion via strain gradients, transferring\nmomentum with elastic waves, etc. The development of new magnetoresistive\ndomain wall sensors based on some of these concepts will be explored. <\/p>\n\n\n\n

On the\nother hand, the project also entails investigating the effect of strain on the magnetic\nproperties of a variety of materials and heterostructures at a more fundamental\nlevel, namely how exchange, DMI or interface anisotropy are affected by strain.\nFor such study, a multiscale modelling approach will be followed. On one hand, a\ndiscrete spin model [2] taking into account the crystal lattice structure and\nthe magnetic moment arrangement at atomistic level, applicable to both\nferromagnetic and antiferromagnetic ordering and including all relevant\ninteractions, will be developed. On the other, the intrinsic material\nparameters for this model (atomistic magnetic moments, exchange matrix,\nanisotropy, etc.) will be obtained from ab-initio quantum-mechanical approaches\nbased on density functional theory. The ultimate goal of this work will be to\ninvestigate efficient ways to reverse the magnetization of ferromagnetic and\nantiferromagnetic nanostructures with voltage or photo-induced picosecond\nstrain pulses. <\/p>\n\n\n\n

[1] C.-Y.\nLiang et al.<\/em>, J. App. Phys. 116,\n123909 (2014).<\/p>\n\n\n\n

[2] R. F. L. Evans et al.<\/em>, J. Phys.: Condens. Matter, 26, 103202 (2014).<\/p>\n","protected":false},"excerpt":{"rendered":"

Host: University of Salamanca Location: Salamanca, Spain Supervisor: Luis Lopez-Diaz, Eduardo Martinez Scientific project: The PhD project is focused on studying the effect of strain on the magnetic properties of different materials, nanostructures and devices. The work to be carried out is theoretical and computational, although it will be done in close collaboration with the… Continue reading “Usal: Modelling magnetization dynamics in piezoelectric\/magnetic devices”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":52,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/fullwidth.php","meta":[],"_links":{"self":[{"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/pages\/129"}],"collection":[{"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=129"}],"version-history":[{"count":8,"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/pages\/129\/revisions"}],"predecessor-version":[{"id":474,"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/pages\/129\/revisions\/474"}],"up":[{"embeddable":true,"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=\/wp\/v2\/pages\/52"}],"wp:attachment":[{"href":"https:\/\/magnefi.c2n.u-psud.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}