Abacwaningi abavela ku-NTNU bakhanyisa izinto zikazibuthe ngezikali ezincane ngokudala amafilimu ngosizo lwama-X ray akhanya ngokwedlulele.
U-Erik Folven, umqondisi weqembu le-oxide electronics eMnyangweni Wezinhlelo Ze-elekthronikhi we-NTNU, kanye nozakwabo base-NTNU nase-Ghent University e-Belgium bazimisele ukubona indlela omagnetic befilimu abancane abashintsha ngayo lapho bephazanyiswa amandla kazibuthe angaphandle.Umsebenzi, oxhaswe ngokwengxenye yi-NTNU Nano kanye noMkhandlu Wokucwaninga waseNorway, ushicilelwe kumagazini I-Physical Review Research.
Ozibuthe abancane
U-Einar Standal Digernes usungule omagnethi abancane abayisikwele abasetshenziswa ekuhloleni.
Omazibuthe abancane abayisikwele, abadalwe yi-NTNU Ph.D.Ikhandidethi i-Einar Standal Digernes, ingama-micrometer amabili nje ububanzi futhi ihlukaniswe izizinda ezine ezingunxantathu, ngasinye sinomumo ozibuthe ohlukile okhomba ngokwewashi noma ngokuphambene newashi eduze kozibuthe.
Kwezinye izinto kazibuthe, amaqembu amancane ama-athomu ahlangana ndawonye abe yizizinda, lapho wonke ama-electron anomumo ofanayo kazibuthe.
Kozibuthe be-NTNU, lezi zizinda zihlangana endaweni emaphakathi—umongo we-vortex—lapho umzuzu kazibuthe ukhomba khona ngokuqondile noma ngaphandle endizeni yezinto.
UFolven uthi:"Zingakhula futhi zinciphe, bese zihlangana zibe munye."
Ama-electron cishe ngesivinini sokukhanya
Ukubona lokhu kwenzeka akulula.Abacwaningi bathathe ama-micromagnets abo bawayisa ku-synchrotron emise okwe-donut engu-80m ububanzi, eyaziwa nge-BESSY II, e-Berlin, lapho ama-electron asheshiswa khona aze ahambe cishe ngesivinini sokukhanya.Lawo ma-electron ahamba ngokushesha abe esekhipha imisebe ye-X egqame kakhulu.
UFolven uthi: “Sithatha la ma-X-ray bese siwasebenzisa njengokukhanya kusibonakhulu sethu.
Ngenxa yokuthi ama-electron ahamba azungeze i-synchrotron ngamaqoqo ahlukaniswe ama-nanosecond amabili, ama-X-ray awakhiphayo eza ngama-pulses anembile.
Isibonakhulu se-X-ray esithwebulayo, noma i-STXM, ithatha lawo ma-X-ray ukuze idale isifinyezo sesakhiwo kazibuthe.Ngokuhlanganisa lezi zifinyezo ndawonye, abacwaningi empeleni bangakha i-movie ebonisa ukuthi i-micromagnet ishintsha kanjani ngokuhamba kwesikhathi.
Ngosizo lwe-STXM, u-Folven nozakwabo baphazamisa ama-micromagnets abo nge-pulse yamanje eyenza insimu kazibuthe, futhi babona izizinda zishintsha ukwakheka kanye ne-vortex core isuka phakathi nendawo.
Uthi: “Unozibuthe omncane kakhulu, bese uyawuhlaba bese uzama ukuwufanekisa njengoba uzinza futhi.Ngemva kwalokho, babona umnyombo ubuyela phakathi—kodwa endleleni emazombezombe, hhayi umugqa oqondile.
“Izodansa ibuyele enkabeni,” kusho uFolven.
Isiliphu esisodwa futhi kuphelile
Lokho kungenxa yokuthi bafunda izinto ze-epitaxial, ezidalwe phezu kwe-substrate evumela abacwaningi ukuthi balungise izakhiwo zezinto ezibonakalayo, kodwa ezovimba ama-X-ray ku-STXM.
Ukusebenza ku-NTNU NanoLab, abacwaningi baxazulule inkinga ye-substrate ngokungcwaba i-micromagnet yabo ngaphansi kongqimba lwekhabhoni ukuvikela izakhiwo zayo kazibuthe.
Babe sebehlikihla ngokucophelela nangokunembile i-substrate engaphansi ngogongolo olugxilile lwe-gallium ions kwaze kwasala ungqimba oluncane kakhulu.Inqubo enzima ingase ithathe amahora angu-8 isampula ngayinye—futhi ukushelela okukodwa kungase kusho inhlekelele.
"Into ebucayi ukuthi, uma ubulala i-magnetism, ngeke sikwazi lokho ngaphambi kokuba sihlale eBerlin," usho kanje."Iqhinga, vele, ukuletha amasampula angaphezu kweyodwa."
Kusukela ku-physics eyisisekelo kuya kumadivayisi azayo
Siyabonga ukuthi isebenzile, futhi ithimba lasebenzisa amasampula alo alungiselelwe ngokucophelela ukushadi ukuthi izizinda ze-micromagnet zikhula kanjani futhi zishwabane ngokuhamba kwesikhathi.Baphinde benza ukulingisa kwekhompuyutha ukuze baqonde kangcono ukuthi yimaphi amandla asebenzayo.
Kanye nokuthuthukisa ulwazi lwethu lwefiziksi eyisisekelo, ukuqonda ukuthi uzibuthe usebenza kanjani kulezi zilinganiso zobude nezikhathi kungaba usizo ekudaleni amadivaysi esikhathi esizayo.
I-Magnetism isivele isetshenziselwa ukugcinwa kwedatha, kodwa abacwaningi okwamanje bafuna izindlela zokuyixhaphaza ngokuqhubekayo.Imiyalo kazibuthe ye-vortex core nezizinda ze-micromagnet, isibonelo, ingase isetshenziselwe ukufaka ikhodi yolwazi ngohlobo luka-0s no-1s.
Abacwaningi manje bahlose ukuphinda lo msebenzi ngezinto ezilwa ne-ferromagnetic, lapho umphumela wenetha wezikhathi zikazibuthe ngazinye ukhanselwa.Lokhu kuyathembisa uma kuziwa ekwenzeni ikhompuyutha—ngokombono, izinto ezilwa ne-ferromagnetic zingasetshenziswa ukwenza amadivaysi adinga amandla amancane futhi ahlale ezinzile ngisho nalapho amandla elahlekile—kodwa kuyinkimbinkimbi kakhulu ukuphenya ngoba izimpawu ezizikhiqizayo zizoba buthakathaka kakhulu. .
Naphezu kwaleyo nselele, uFolven unethemba.“Sihlanganise isisekelo sokuqala ngokubonisa ukuthi singakwazi ukwenza amasampula futhi sibheke kuwo ngama-X ray,” usho kanje."Isinyathelo esilandelayo kuzoba ukubona ukuthi singakwazi yini ukwenza amasampula ekhwalithi ephezulu ngokwanele ukuze sithole isignali eyanele ezintweni ezilwa ne-ferromagnetic."
Isikhathi sokuthumela: May-10-2021