Vatsvaguriri vekuNTNU vari kujekesa zvinhu zvine magineti pazviyero zvidiki nekugadzira mafirimu nerubatsiro rwemaX-ray akajeka zvikuru.
Erik Folven, mumwe wevatungamiriri veboka re oxide electronics paDhipatimendi re Electronic Systems reNTNU, pamwe nevamwe vashandi veNTNU neGhent University muBelgium vakatanga kuona kuti ma micromagnets e thin-film anochinja sei kana akakanganiswa nesimba remagineti rekunze. Basa iri, rakatsigirwa nemari neNTNU Nano neResearch Council yeNorway, rakaburitswa mujenari rePhysical Review Research.
Magineti madiki
Einar Standal Digernes akagadzira magineti madiki akaenzana akashandiswa mukuyedza uku.
Magineti madiki ane sikweya, akagadzirwa neNTNU Ph.D. candidate Einar Standal Digernes, ane upamhi hwema micrometer maviri chete uye akakamurwa kuita mativi mana etriangular, rimwe nerimwe riine magnetic orientation yakasiyana inonongedza wachi kana kuti inopikisana newachi inotenderedza magineti.
Mune zvimwe zvinhu zvine magineti, mapoka madiki emaatomu anobatana kuita nzvimbo dzinonzi madomeni, umo maerekitironi ese ane mafambiro akafanana emagineti.
Mumagineti eNTNU, madomeni aya anosangana panzvimbo yepakati—pakati pevortex—apo nguva yemagineti inonongedza zvakananga mukati kana kunze kwendege yezvinhu.
"Patinoshandisa simba remagineti, akawanda ema domain aya anonongedzera kudivi rimwe chete," anodaro Folven. "Anogona kukura uye anogona kuderera, uye anogona kubatana."
Maerekitironi anenge achimhanya nechiedza
Kuona izvi zvichiitika hazvisi nyore. Vaongorori vakatora ma micromagnets avo kuenda ku synchrotron ine upamhi hwema 80m, inozivikanwa seBESSY II, muBerlin, uko ma electron anokurumidziswa kusvika afamba nekumhanya kwechiedza. Ma electron iwayo anofamba nekukurumidza anobva aburitsa ma X-ray akajeka zvikuru.
"Tinotora maX-ray aya toashandisa sechiedza chiri mumaikorosikopu edu," anodaro Folven.
Nekuti maerekitironi anofamba-famba achitenderedza synchrotron muzvikwata zvakaparadzaniswa ne nanoseconds mbiri, maX-ray aanoburitsa anouya nemapulse chaiwo.
Maikorosikopu yeX-ray inoskena, kana kuti STXM, inotora maX-ray iwayo kuti igadzire mufananidzo wechimiro chemagnetic chechinhu chacho. Nekusonera mifananidzo iyi pamwe chete, vaongorori vanogona kugadzira bhaisikopo rinoratidza kuti micromagnet inochinja sei nekufamba kwenguva.
Nerubatsiro rweSTXM, Folven nevamwe vake vakakanganisa ma micromagnets avo ne pulse ye current yakagadzira simba remagineti, uye vakaona nzvimbo dzichichinja chimiro uye vortex core ichifamba kubva pakati.
“Une magineti diki kwazvo, wobva waibaya woedza kuifungidzira painogadzika zvakare,” anodaro. Mushure mezvo, vakaona musimboti uchidzokera pakati—asi munzira yakakombama, kwete mutsetse wakatwasuka.
"Ichatamba zvakare pakati," anodaro Folven.
Kutsvedza kamwe chete uye zvapera
Izvi zvinodaro nekuti vanodzidza zvinhu zve epitaxial, izvo zvinogadzirwa pamusoro pe substrate inobvumira vaongorori kugadzirisa hunhu hwezvinhu zvacho, asi zvinovhara maX-ray muSTXM.
Vachishanda muNTNU NanoLab, vaongorori vakagadzirisa dambudziko re substrate nekuviga micromagnet yavo pasi pekabhoni kuti vadzivirire hunhu hwayo hwemagineti.
Zvadaro vakabvisa pasi pevhu nokungwarira uye nemazvo nedanda rakananga remaion egallium kusvika kwasara jira rakatetepa chete. Maitiro acho aitora maawa masere pamuenzaniso wega wega—uye kudonha kamwe chete kwaigona kukonzera njodzi.
"Chinhu chakakosha ndechekuti, kana ukauraya simba remagineti, hatizozvizivi tisati tagara muBerlin," anodaro. "Chinhu chakakosha ndechekuti tiuye nemuenzaniso unopfuura mumwe chete."
Kubva pafizikisi yepakutanga kusvika kumidziyo yeramangwana
Nerombo rakanaka zvakashanda, uye timu yakashandisa mienzaniso yavo yakanyatsogadzirwa kuti iongorore kuti ma domains e micromagnet anokura sei uye anodzikira sei nekufamba kwenguva. Vakagadzirawo ma simulations emakombiyuta kuti vanzwisise zviri nani kuti ndeapi masimba ari kushanda.
Pamusoro pekusimudzira ruzivo rwedu rwefizikisi yepakutanga, kunzwisisa mashandiro anoita magnetism pakureba uku nenguva kunogona kubatsira mukugadzira zvishandiso zvemangwana.
Magnetism yatove kushandiswa kuchengetera data, asi vaongorori vari kutsvaga nzira dzekuishandisa zvakanyanya. Maonero emagineti evortex core uye ma domains e micromagnet, semuenzaniso, anogona kushandiswa kunyora ruzivo muchimiro che 0s na 1s.
Vaongorori vava kuda kudzokorora basa iri nezvinhu zvinorwisa ferromagnetic, uko mhedzisiro yechinhu chimwe nechimwe chinodzima simba remagineti. Izvi zvinovimbisa kana zvasvika pakushandisa komputa—mupfungwa, zvinhu zvinorwisa ferromagnetic zvinogona kushandiswa kugadzira michina inoda simba shoma uye inoramba yakagadzikana kunyangwe simba rarasika—asi zvakaoma kuongorora nekuti zviratidzo zvavanoburitsa zvichave zvisina simba.
Pasinei nedambudziko iroro, Folven ane tariro. "Takaongorora nzvimbo yekutanga nekuratidza kuti tinogona kugadzira masampuli uye kuaongorora neX-rays," anodaro. "Danho rinotevera richave rekuona kana tichigona kugadzira masampuli emhando yepamusoro kuti tiwane chiratidzo chakakwana kubva kune chinhu chinodzivirira ferromagnetic."
Nguva yekutumira: Chivabvu-10-2021