Ofufuza ochokera ku NTNU akuunikira zinthu zamagetsi pamasikelo ang'onoang'ono popanga mafilimu mothandizidwa ndi ma X-ray owala kwambiri.
Erik Folven, yemwe ndi mkulu wa gulu la oxide electronics ku NTNU's Department of Electronic Systems, ndi anzake a ku NTNU ndi yunivesite ya Ghent ku Belgium ananyamuka kuti awone momwe maginito amtundu wopyapyala amasinthira akasokonezedwa ndi mphamvu yamagetsi yakunja.Ntchitoyi, yothandizidwa pang'ono ndi NTNU Nano ndi Research Council of Norway, idasindikizidwa mu nyuzipepala Physical Review Research.
Maginito ang'onoang'ono
Einar Standal Digernes anapanga maginito ang'onoang'ono a square omwe amagwiritsidwa ntchito poyesera.
Maginito ang'onoang'ono a square, opangidwa ndi NTNU Ph.D.wosankhidwa Einar Standal Digernes, ndi ma micrometer awiri okha m'lifupi ndipo agawika m'magawo anayi a katatu, iliyonse ili ndi maginito osiyana siyana omwe amaloza molunjika kapena motsutsa-wotchi mozungulira maginito.
Muzinthu zina za maginito, magulu ang'onoang'ono a ma atomu amalumikizana m'madera otchedwa madera, momwe ma elekitironi onse amakhala ndi maginito ofanana.
Mu maginito a NTNU, maderawa amakumana pamalo apakati-pakatikati pa vortex-pomwe mphamvu ya maginito imalozera mkati kapena kunja kwa ndege.
Folven anati: “Tikagwiritsa ntchito mphamvu ya maginito, madera ambiri amaloza mbali imodzi."Amatha kukula ndipo amatha kuchepa, kenako amatha kulumikizana."
Ma electron pafupifupi pa liwiro la kuwala
Kuwona izi zikuchitika sikophweka.Ofufuzawo adatenga ma micromagnets awo kupita ku synchrotron yowoneka ngati donut ya 80m, yomwe imadziwika kuti BESSY II, ku Berlin, komwe ma electron amafulumizitsa mpaka akuyenda pafupifupi liwiro la kuwala.Ma elekitironi othamanga kwambiri amenewo amatulutsa ma X-ray owala kwambiri.
Folven anati: “Timatenga ma X-ray amenewa ndi kuwagwiritsa ntchito ngati kuwala kwa maikulosikopu athu.
Chifukwa ma elekitironi amayenda mozungulira ma synchrotron m'magulu olekanitsidwa ndi ma nanoseconds awiri, ma X-ray omwe amawatulutsa amabwera momveka bwino.
Katundu wa microscope wa X-ray, kapena STXM, amatenga ma X-ray amenewo kuti apange chithunzithunzi cha kapangidwe kake ka maginito.Polumikiza izi pamodzi, ofufuza amatha kupanga kanema wowonetsa momwe maginito amasinthira pakapita nthawi.
Mothandizidwa ndi STXM, Folven ndi anzake adasokoneza ma micromagnets awo ndi mphamvu yamakono yomwe imapanga mphamvu ya maginito, ndipo adawona madera akusintha mawonekedwe ndi vortex core kuchoka pakati.
Iye anati: “Muli ndi maginito aang’ono kwambiri, ndiyeno mumawagwedeza ndikuyesera kuwajambula pamene akukhazikikanso.Pambuyo pake, anawona pakatiwo kubwereranso pakati—koma m’njira yokhotakhota, osati yowongoka.
"Zidzakhala ngati kuvina kubwerera pakati," akutero Folven.
Kutsika kumodzi ndipo kwatha
Ndi chifukwa chakuti amaphunzira zipangizo za epitaxial, zomwe zimapangidwira pamwamba pa gawo lapansi lomwe limalola ochita kafukufuku kuti azitha kusintha zinthu, koma amalepheretsa ma X-ray mu STXM.
Kugwira ntchito ku NTNU NanoLab, ofufuzawo adathetsa vuto la gawo lapansi mwa kukwirira ma micromagnet awo pansi pa kaboni kuti ateteze maginito ake.
Kenako mosamala ndi ndendende anadula gawo lapansi ndi mtengo wolunjika wa ayoni a gallium mpaka kutsala wosanjikiza woonda kwambiri.Kuchita khamako kungatenge maola asanu ndi atatu pa chitsanzo chilichonse—ndipo kutsika kumodzi kungasonyeze tsoka.
"Chofunikira ndichakuti, mukapha maginito, sitidziwa izi tisanakhale ku Berlin," akutero."Chinyengo ndichoti mubweretse zitsanzo zingapo."
Kuyambira physics yoyambira mpaka zida zamtsogolo
Mwamwayi zinagwira ntchito, ndipo gululo linagwiritsa ntchito zitsanzo zawo zokonzedwa bwino kuti ziwonetse momwe madera a micromagnet amakulira ndikuchepera pakapita nthawi.Anapanganso zoyeserera zamakompyuta kuti zimvetsetse bwino mphamvu zomwe zimagwira ntchito.
Komanso kupititsa patsogolo chidziwitso chathu cha physics yofunikira, kumvetsetsa momwe maginito amagwirira ntchito pazitali ndi nthawi izi zingakhale zothandiza popanga zida zamtsogolo.
Magnetism imagwiritsidwa ntchito kale kusungirako deta, koma ofufuza akuyang'ana njira zowonjezera.Maginito a maginito a vortex core ndi madera a micromagnet, mwachitsanzo, atha kugwiritsidwa ntchito kusindikiza zambiri mu mawonekedwe a 0s ndi 1s.
Ofufuzawa tsopano akufuna kubwereza ntchitoyi ndi zida za anti-ferromagnetic, pomwe mphamvu ya maginito yamunthu imasiya.Izi zikulonjeza pankhani ya computing-mwachidziwitso, zida zotsutsana ndi ferromagnetic zitha kugwiritsidwa ntchito kupanga zida zomwe zimafunikira mphamvu pang'ono ndikukhalabe okhazikika ngakhale mphamvu itatayika-koma zovuta kwambiri kuti mufufuze chifukwa zizindikiro zomwe zimapanga zidzakhala zofooka kwambiri. .
Ngakhale zili choncho, Folven ali ndi chiyembekezo."Takambirana gawo loyamba powonetsa kuti titha kupanga zitsanzo ndikuziyang'ana ndi X-ray," akutero."Chotsatira chidzakhala kuwona ngati tingapange zitsanzo zamtundu wapamwamba kwambiri kuti tipeze chizindikiro chokwanira kuchokera kuzinthu zotsutsana ndi ferromagnetic."
Nthawi yotumiza: May-10-2021