M\u0131knat\u0131s ta\u015f\u0131 (Latince magnes) denizcilerin yeni d\u00fcnyalar ke\u015ffetmesine yard\u0131mc\u0131 oldu; ama denizciler \u015fa\u015f\u0131rt\u0131c\u0131 s\u0131rlar\u0131n\u0131 uzun y\u0131llar bilim adamlar\u0131ndan saklad\u0131lar.Bir m\u0131knat\u0131s\u0131n daha k\u00fc\u00e7\u00fck m\u0131knat\u0131slardan olu\u015ftu\u011funu g\u00f6steren \u201ck\u0131r\u0131k m\u0131knat\u0131s\u201d ad\u0131 verilen deney 1269 y\u0131l\u0131nda yap\u0131lm\u0131\u015fsa da, manyetikli\u011fin yap\u0131s\u0131 konusunda ilk belirtiler, 1820 y\u0131l\u0131nda Oersted\u2019\u0131n elektrik ak\u0131m\u0131n\u0131n m\u0131knat\u0131sl\u0131 bir i\u011fneyi sapt\u0131rma \u00f6zelli\u011fini g\u00f6zlemesiyle ortaya \u00e7\u0131kt\u0131.Bu saptamadan sonra manyetikli\u011fin ak\u0131mlarla ili\u015fkisi oldu\u011fu, D\u00fcnya, G\u00fcne\u015f ve G\u00f6kadam\u0131z \u00f6l\u00e7e\u011finde manyetik alanlar\u0131n ak\u0131mlardan kaynakland\u0131\u011f\u0131 anla\u015f\u0131ld\u0131.Ne var ki, bir m\u0131knat\u0131sta bu ak\u0131mlar\u0131 g\u00f6zlemlemek m\u00fcmk\u00fcn de\u011fildir; \u015fu halde mikroskopik bir yap\u0131lar\u0131 olmas\u0131 gerekir.
\n \u00d6nce bu ak\u0131mlar elektronlar\u0131n \u00e7ekirdek \u00e7evresinde, sonra kendi \u00e7evrelerinde d\u00f6nmesine (\u201cspin\u201d) ba\u011fland\u0131; ancak atomun bu gezegen bi\u00e7imindeki g\u00f6r\u00fcn\u00fcm\u00fc daha sonra d\u00fczeltildi: par\u00e7ac\u0131klar da minik m\u0131knat\u0131slar gibi davran\u0131yordu.\u0130\u015fte bunlar\u0131n manyetik \u00f6zelliklerinden dolay\u0131d\u0131r ki, NMR (n\u00fckleer manyetik rezonans) ile g\u00f6r\u00fcnt\u00fcleme tekni\u011finde yararlan\u0131lan protonlar dokular\u0131m\u0131z\u0131n sa\u011fl\u0131\u011f\u0131 hakk\u0131nda bize bilgi verir ve elektronlar G\u00fcne\u015f\u2019in veya \u00e7ok uzaklardaki pulsarlar\u0131n manyetik alanlar\u0131n\u0131 \u00f6l\u00e7memizi sa\u011flar.
\n Bizim \u00f6l\u00e7e\u011fimizde bir malzemenin m\u0131knat\u0131slanmas\u0131, par\u00e7ac\u0131k d\u00fczeyindeki bu k\u00fc\u00e7\u00fck m\u0131knat\u0131slar\u0131n bir d\u0131\u015f manyetik alan\u0131n etkisi alt\u0131nda (k\u0131smen) do\u011frusal dizilimiyle a\u00e7\u0131klan\u0131r.Ama ana bile\u015feni demir, kobalt veya nikel olan baz\u0131 ala\u015f\u0131mlar, en az\u0131ndan s\u0131cakl\u0131k belirli bir \u201ckritik\u201d de\u011feri a\u015fmad\u0131k\u00e7a kendili\u011finden m\u0131knat\u0131slanma \u00f6zelli\u011fi g\u00f6sterir.Olay\u0131n kesin a\u00e7\u0131klamas\u0131, kuvantum fizi\u011fine ve faz ge\u00e7i\u015fleri kuram\u0131na (hal de\u011fi\u015fimleri) dayan\u0131r.Kritik s\u0131cakl\u0131k dolay\u0131nda m\u0131knat\u0131slanmadaki \u00f6nemli dalgalanmalar gibi olaylar, tam olarak ancak 20 y\u0131l kadar \u00f6nce, yani yap\u0131lan ilk deneylerden 700 y\u0131l kadar sonra anla\u015f\u0131ld\u0131.Manyetik \u015feritlerden bilgisayar belleklerine ve ileti\u015fim sistemleri bile\u015fenlerinden so\u011futma tekniklerine kadar pratik uygulamalarsa bu kadar uzun zaman beklemedi.<\/p>\n","protected":false},"excerpt":{"rendered":"
M\u0131knat\u0131s ta\u015f\u0131 (Latince magnes) denizcilerin yeni d\u00fcnyalar ke\u015ffetmesine yard\u0131mc\u0131 oldu; ama denizciler \u015fa\u015f\u0131rt\u0131c\u0131 s\u0131rlar\u0131n\u0131 uzun y\u0131llar bilim adamlar\u0131ndan saklad\u0131lar.Bir m\u0131knat\u0131s\u0131n daha k\u00fc\u00e7\u00fck m\u0131knat\u0131slardan olu\u015ftu\u011funu g\u00f6steren \u201ck\u0131r\u0131k m\u0131knat\u0131s\u201d ad\u0131 verilen deney 1269 y\u0131l\u0131nda yap\u0131lm\u0131\u015fsa da, manyetikli\u011fin yap\u0131s\u0131 konusunda ilk belirtiler, 1820 y\u0131l\u0131nda Oersted\u2019\u0131n elektrik ak\u0131m\u0131n\u0131n m\u0131knat\u0131sl\u0131 bir i\u011fneyi sapt\u0131rma \u00f6zelli\u011fini g\u00f6zlemesiyle ortaya \u00e7\u0131kt\u0131.Bu saptamadan sonra manyetikli\u011fin …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[11572,11571,7186,5094],"class_list":["post-6145","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-kirik-miknatis","tag-magnetiklik","tag-miknatis","tag-nukleer-manyetik-rezonans"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/6145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=6145"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/6145\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=6145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=6145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=6145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}