Abashakashatsi bo muri NTNU barimo gutanga urumuri ku bikoresho bya rukuruzi ku rugero ruto bakora filime bakoresheje imirasire ya X-rays irabagirana cyane.
Erik Folven, umuyobozi wungirije w’itsinda rya oxide electronics muri NTNU Department of Electronic Systems, hamwe na bagenzi be bo muri NTNU na Kaminuza ya Ghent mu Bubiligi bagiye kureba uburyo micromagnets za thin-film zihinduka iyo zibangamiwe n’imbaraga za rukuruzi zo hanze. Igikorwa cyatewe inkunga na NTNU Nano n’Inama y’Ubushakashatsi ya Noruveje, cyasohotse mu kinyamakuru Physical Review Research.
Udusumari duto
Einar Standal Digernes yavumbuye rukuruzi ntoya zakoreshejwe mu igerageza.
Udukuru duto twa kare, twakozwe na NTNU Ph.D. candidate Einar Standal Digernes, dufite ubugari bwa mikorometero ebyiri gusa kandi tugabanyijemo ibice bine by’impandeshatu, buri kimwe gifite icyerekezo gitandukanye cya rukuruzi cyerekeza ku cyerekezo cy’isaha cyangwa kinyuranyije n’isaha kizenguruka rukuruzi.
Mu bikoresho bimwe na bimwe bya rukuruzi, amatsinda mato ya atome ahurira hamwe mu duce twitwa domaine, aho electron zose zifite icyerekezo kimwe cya rukuruzi.
Muri magneti za NTNU, izi domaine zihurira ahantu hagati—aho ishingiro ry’urumuri—aho akanya ka magneti kerekeza neza cyangwa hanze y’umurongo w’ibikoresho.
Folven agira ati: “Iyo dukoresheje imbaraga za rukuruzi, izi domaine nyinshi zizajya zerekeza mu cyerekezo kimwe. Zirashobora gukura no kugabanuka, hanyuma zigashobora kwihuza.”
Elektroni hafi ku muvuduko w'urumuri
Kubona ibi bibaho ntabwo byoroshye. Abashakashatsi bajyanye micromagnets zabo kuri synchrotron ifite ubugari bwa metero 80, izwi nka BESSY II, i Berlin, aho electrons zihuta kugeza ubwo zigenda hafi ku muvuduko w'urumuri. Izo electrons zihuta cyane zihita zisohora imirasire ya X-rays irabagirana cyane.
Folven agira ati: “Dufata izi X-rays tukazikoresha nk'urumuri muri mikorosikopi yacu.”
Kubera ko electron zizenguruka synchrotron mu matsinda atandukanye na nanosegonda ebyiri, imirasire ya X isohora iza mu buryo busobanutse neza.
Mikorosikopi ya X-ray ikoresha scanning transmission, cyangwa STXM, ifata iyo mirasire ya X kugira ngo ikore ishusho y'imiterere ya rukuruzi y'ibikoresho. Mu guhuza aya mafoto, abashakashatsi bashobora gukora filime igaragaza uburyo micromagnet ihinduka uko igihe kigenda.
Babifashijwemo na STXM, Folven na bagenzi be bahungabanyije micromagnets zabo bakoresheje umuvuduko w'amashanyarazi watumye imbaraga za rukuruzi zikora, maze babona imiterere y'aho ibintu biherereye ihinduka ndetse n'inyuma y'umuvuduko w'amazi ikava hagati.
Agira ati: “Ufite rukuruzi nto cyane, hanyuma ukayikoraho ukagerageza kuyishushanya uko yongera gutuza.” Nyuma yaho, babonye igice cy’imbere gisubira hagati—ariko mu nzira igoramye, ntabwo ari umurongo ugororotse.
Folven agira ati: “Bizabyina bisubire hagati.”
Gutembera rimwe birarangiye
Ibyo biterwa nuko biga ibikoresho bya epitaxial, bikorerwa hejuru y’ikintu gifasha abashakashatsi guhindura imiterere y’ibikoresho, ariko bikabuza imirasire ya X muri STXM.
Bakorera muri NTNU NanoLab, abashakashatsi bakemuye ikibazo cy’ubutaka bapfuka micromagnet yabo munsi y’urwego rwa karuboni kugira ngo barinde imiterere yayo ya rukuruzi.
Hanyuma baciyemo neza kandi neza igice cyo munsi y’ubutaka bakoresheje umuyoboro w’iyoni za gallium kugeza hasigaye urwego ruto cyane. Igikorwa cyo kugerageza cyashoboraga gufata amasaha umunani kuri buri ngero—kandi gucika rimwe byashoboraga guteza akaga.
“Ikintu cy’ingenzi ni uko, niba wishe imbaraga zidasanzwe, tutazabimenya mbere yuko twicara i Berlin,” aragira ati. “Birumvikana ko amayeri ari ukuzana ingero zirenze imwe.”
Kuva kuri fiziki y'ibanze kugeza ku bikoresho by'ejo hazaza
Ku bw'amahirwe byaragenze neza, kandi itsinda ryakoresheje ingero zabo zateguwe neza kugira ngo bagaragaze uburyo domaine za micromagnet zikura kandi zikagabanuka uko igihe kigenda gihita. Banakoze simulation za mudasobwa kugira ngo basobanukirwe neza imbaraga zirimo gukora.
Uretse guteza imbere ubumenyi bwacu mu bijyanye na fiziki y'ibanze, gusobanukirwa uburyo rukuruzi ikora kuri ibi bipimo by'igihe kirekire n'igihe bishobora gufasha mu guhanga ibikoresho by'ejo hazaza.
Ubukuru bw'amakuru busanzwe bukoreshwa mu kubika amakuru, ariko abashakashatsi ubu barimo gushaka uburyo bwo kuyakoresha kurushaho. Urugero, icyerekezo cya rukuruzi cy'inyuma y'umuraba n'aho imbuga za micromagnete ziherereye, gishobora gukoreshwa mu gusesengura amakuru mu buryo bwa 0 na 1s.
Abashakashatsi ubu bagamije gusubiramo iki gikorwa bakoresheje ibikoresho birwanya feri, aho ingaruka z'ibihe bya rukuruzi ku giti cyabo zihagarara. Ibi biratanga icyizere iyo bigeze ku bijyanye n'ikoranabuhanga rya mudasobwa—mu by'ukuri, ibikoresho birwanya feri bishobora gukoreshwa mu gukora ibikoresho bidasaba ingufu nke kandi bigakomeza kuba bihamye nubwo ingufu zabuze—ariko bigoye cyane kubigenzura kuko ibimenyetso bitanga bizaba ari bike cyane.
Nubwo hari icyo kibazo, Folven afite icyizere. Yagize ati: “Twakoze ku rufatiro rwa mbere twerekanye ko dushobora gukora ingero no kuzireba dukoresheje imirasire ya X.” Intambwe ikurikiraho izaba iyo kureba niba dushobora gukora ingero zifite ubuziranenge buhagije kugira ngo tubone ibimenyetso bihagije bivuye mu bikoresho birwanya ferromagnetique.”
Igihe cyo kohereza: Gicurasi-10-2021