Ko te āhuatanga autō o te rauemi

A, no te whakanohoia i roto i te papa autō o te ahanoa, ona "whanonga" me te momo o te motu huringa hanganga e whakawhirinaki ki runga ki te rauemi i hanga i nei te ahanoa. Ka taea te wehea rauemi katoa mohiotia ki ngā rōpū e rima matua: paramagnetic, ferromagnetic me antiferromagnetic, ferrimagnetic me diamagnetic. E ai ki tenei whakarōpū, rerekē āhuatanga autō o te rauemi. Hei kitea i roto i te mea e ngaro i muri i enei ngā, whakaaro ia rōpū i roto i te taipitopito atu.

Matū whakaatu āhuatanga o paramagnetism, āhuatanga uruhanga autō ki te tohu pai, ahakoa o te uara o te papa autō waho i roto i nei te ahanoa tahuri. Ko te māngai o tenei rōpū pai mohiotia he waikura nitric me te haurehu hāora, kawakore-whenua me ngā rōpū kawakore, me te tote ferrous.

Ko te susceptibility autō tiketike tohu pai (1 tae Mill.) Ferromagnets konga fakanatula. Te riroraa ti'aturi i runga i te kaha o te mara waho, me te pāmahana susceptibility rerekē whānui. Mea nui, mai i te taime o matūriki pūmotu he rerekē sublattices i te hanganga, te uara tapeke o te kau, ko te kore.

Ko te taitara, a ki runga ki etahi o nga āhuatanga e tata ki te rauemi ferromagnetic ratou. E piri ratou e te fakafalala tiketike o te susceptibility o te wera me te kaha mara, engari i reira he rerekētanga. Ko te taime autō e kore e rite ki tetahi ki tetahi whakanohoia i roto i sublattices ngota, Heoi, pērā i te rōpū o mua, he kahorekore te momeniti katoa. Taonga tūturu i roto i te magnetization māhorahora. Communication sublattices antiparallel. Ko te ferrites pai mohiotia. He nui ngā āhuatanga autō o pūhui o tenei rōpū, na kei te maha ratou whakamahia i roto i te toi.

O ngā moni ko te rōpū o antiferromagnets. Ki runga ki te meangiti, kua whakaritea taua matū i raro i te tetahi ngota rohe pāmahana me ngā katote i roto i te hanganga karaihe ripekapeka fakanatula huri ratou taime autō, whiwhi takotoranga protivoparallelnoe. e te tukanga tino rerekē wahi e matū whakawera - tuhia e ia ngā āhuatanga autō āhuatanga mō te rōpū o ngā matū paramagnetic. Ko ētahi tauira ko ngā pākawa waro, waikura, a pera atu.

Na rawa, te diamagnetic. Ko te āhuatanga autō o matū o tenei rōpū kore e whakawhirinaki i runga i te kaha mara, a ka he tōraro te uara o te susceptibility autō. Ki te taonga he here kotuari, he reira he diamagnetic "parakore". Māngai - koura, parahi, haurehu e mangere , me te pera atu.

Kei te whānui nga āhuatanga autō o te rauemi e whakamahia ana i roto i te hangarau hou. Hei tauira, i tukitukia e te kopiko kopiko hiko i runga i ngā rauemi autō ngohengohe. High uruhanga me te magnetized ki waiwai, ara i roto i te kaha iti, te tikanga o te kuiti koropiko hysteresis i te kauwhata, me te mate iti i roto i te hokinga whakamuri autō e kī i engineering hiko. Ki te hāngai āhuatanga autō o mea ki te rauemi autō ngohengohe, mo nga hua i hanga o reira āhuatanga e te rere nui e iti anake i te waiwai. I roto i te mahi, tenei te tikanga o te taea ki te whakaiti i te rahi o te iahiko autō, reira whakaiti i te taimaha taputapu. Heoi, nga painga me te ngoikoretanga takoto - mara tauutuutu mahia ngā Eddy taua rauemi meinga whakawera, na kei te faateimaha i te otinga tau te pēne.

Ko tētahi atu momo o te rauemi - pakeke kaha coercive autō i te mea i te iti rawa 4000 amperes ia mita. Tenei te tikanga e te mara autō o kaha nui, i muri nei mau te rauemi āhuatanga autō, hoko e tika ana mo te hokinga whakamuri magnetization o te aukume tūturu.