{"id":214554,"date":"2024-11-10T05:57:00","date_gmt":"2024-11-10T05:57:00","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=214554"},"modified":"2024-11-10T05:57:00","modified_gmt":"2024-11-10T05:57:00","slug":"%e7%a3%81%e5%a0%b4%e3%81%8c%e7%a3%81%e6%b0%97%e3%83%a1%e3%83%a2%e3%83%aa%e8%a3%85%e7%bd%ae%e3%81%ae%e8%a8%ad%e8%a8%88%e3%81%ab%e6%9e%9c%e3%81%9f%e3%81%99%e5%bd%b9%e5%89%b2%e3%81%a8%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e7%a3%81%e5%a0%b4%e3%81%8c%e7%a3%81%e6%b0%97%e3%83%a1%e3%83%a2%e3%83%aa%e8%a3%85%e7%bd%ae%e3%81%ae%e8%a8%ad%e8%a8%88%e3%81%ab%e6%9e%9c%e3%81%9f%e3%81%99%e5%bd%b9%e5%89%b2%e3%81%a8%e3%81%af\/","title":{"rendered":"\u78c1\u5834\u304c\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u306b\u679c\u305f\u3059\u5f79\u5272\u3068\u306f"},"content":{"rendered":"<p class=\"sidekick\">\u78c1\u5834\u304c\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u306b\u679c\u305f\u3059\u5f79\u5272\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3002\u78c1\u5834\u306e\u57fa\u672c\u539f\u7406\u3068\u305d\u306e\u5fdc\u7528\u65b9\u6cd5\u3092\u7c21\u5358\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>\u78c1\u5834\u304c\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u306b\u679c\u305f\u3059\u5f79\u5272\u3068\u306f<\/h2>\n<p>\u78c1\u5834\uff08\u78c1\u754c\uff09\u306f\u3001\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u88c5\u7f6e\u306b\u306f\u3001\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u30c9\u30e9\u30a4\u30d6\uff08HDD\uff09\u3084\u78c1\u6c17\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u30e1\u30e2\u30ea\uff08MRAM\uff09\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u3067\u306f\u3001\u78c1\u5834\u304c\u5177\u4f53\u7684\u306b\u3069\u306e\u3088\u3046\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u306e\u304b\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u78c1\u6c17\u8a18\u9332\u306e\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306f\u3001\u60c5\u5831\u3092\u78c1\u6027\u4f53\u306e\u5fae\u5c0f\u90e8\u5206\u306e\u78c1\u5316\u65b9\u5411\u3068\u3057\u3066\u8a18\u9332\u3057\u307e\u3059\u3002\u3053\u306e\u78c1\u5316\u65b9\u5411\u3092\u5236\u5fa1\u30fb\u8aad\u307f\u53d6\u308b\u305f\u3081\u306b\u306f\u3001\u78c1\u5834\u304c\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u65b9\u7a0b\u5f0f\u306b\u3088\u308a\u3001\u78c1\u5316 \\( M \\) \u3068\u78c1\u5834 \\( H \\) \u306e\u95a2\u4fc2\u304c\u8a18\u8ff0\u3055\u308c\u307e\u3059:<\/p>\n<p>\\( M = \\chi H \\)<\/p>\n<p>\u3053\u3053\u3067\u3001\\( \\chi \\) \u306f\u78c1\u5316\u7387\u3067\u3059\u3002\u3053\u306e\u95a2\u4fc2\u306b\u3088\u308a\u3001\u5916\u90e8\u78c1\u5834\u3092\u5909\u3048\u308b\u3053\u3068\u3067\u78c1\u6027\u4f53\u306e\u78c1\u5316\u72b6\u614b\u3092\u64cd\u4f5c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u30cf\u30fc\u30c9\u30c7\u30a3\u30b9\u30af\u30c9\u30e9\u30a4\u30d6\uff08HDD\uff09\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u5f79\u5272<\/h2>\n<p>HDD\u306f\u30c7\u30fc\u30bf\u3092\u78c1\u6c17\u30c7\u30a3\u30b9\u30af\u306b\u8a18\u9332\u3057\u307e\u3059\u3002\u30c7\u30a3\u30b9\u30af\u306f\u9ad8\u901f\u3067\u56de\u8ee2\u3057\u3001\u78c1\u6c17\u30d8\u30c3\u30c9\u306b\u3088\u3063\u3066\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u66f8\u304d\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u78c1\u6c17\u30d8\u30c3\u30c9\u306f\u3001\u5c40\u6240\u7684\u306a\u78c1\u5834\u3092\u751f\u6210\u3057\u3001\u30c7\u30a3\u30b9\u30af\u8868\u9762\u306e\u5fae\u5c0f\u9818\u57df\u3092\u78c1\u5316\u3055\u305b\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u66f8\u304d\u8fbc\u307f\u30d7\u30ed\u30bb\u30b9:<\/strong> \u66f8\u304d\u8fbc\u307f\u30d8\u30c3\u30c9\u306f\u5f37\u529b\u306a\u78c1\u5834\u3092\u751f\u6210\u3057\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u306a\u308b\u30c7\u30a3\u30b9\u30af\u306e\u9818\u57df\u3092\u518d\u78c1\u5316\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8aad\u307f\u53d6\u308a\u30d7\u30ed\u30bb\u30b9:<\/strong> \u8aad\u307f\u53d6\u308a\u30d8\u30c3\u30c9\u306f\u3001\u30c7\u30a3\u30b9\u30af\u306e\u8868\u9762\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\u5fae\u5c0f\u78c1\u5834\u306e\u5909\u5316\u3092\u96fb\u6c17\u4fe1\u53f7\u3068\u3057\u3066\u691c\u51fa\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u78c1\u6c17\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u30e1\u30e2\u30ea\uff08MRAM\uff09\u306b\u304a\u3051\u308b\u78c1\u5834\u306e\u5f79\u5272<\/h2>\n<p>MRAM\u306f\u3001\u78c1\u6c17\u30c8\u30cd\u30eb\u63a5\u5408\uff08MTJ\uff09\u3068\u3044\u3046\u69cb\u9020\u3092\u5229\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u8a18\u9332\u3057\u307e\u3059\u3002MTJ\u306f\u3001\u78c1\u6027\u5c64\u3068\u975e\u78c1\u6027\u5c64\u304c\u4ea4\u4e92\u306b\u7a4d\u5c64\u3055\u308c\u305f\u69cb\u9020\u3067\u3001\u78c1\u6027\u5c64\u306e\u78c1\u5316\u65b9\u5411\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u304c\u8a18\u9332\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u3082\u78c1\u5834\u304c\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u66f8\u304d\u8fbc\u307f\u30d7\u30ed\u30bb\u30b9:<\/strong> \u901a\u5e38\u306e\u78c1\u5834\u3092\u66f8\u304d\u8fbc\u307f\u30e9\u30a4\u30f3\u306b\u6d41\u3057\u3001MTJ\u306e\u78c1\u5316\u65b9\u5411\u3092\u5909\u66f4\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u8aad\u307f\u53d6\u308a\u30d7\u30ed\u30bb\u30b9:<\/strong> MTJ\u306e\u62b5\u6297\u5909\u5316\u306b\u57fa\u3065\u304d\u3001\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u78c1\u5834\u306e\u751f\u6210\u3068\u5236\u5fa1<\/h2>\n<p>\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306b\u304a\u3051\u308b\u78c1\u5834\u306f\u3001\u4e3b\u306b\u96fb\u6d41\u306e\u6d41\u308c\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u30a2\u30f3\u30da\u30fc\u30eb\u306e\u6cd5\u5247\u306b\u57fa\u3065\u304d\u3001\u96fb\u6d41 \\( I \\) \u304c\u6d41\u308c\u308b\u3068\u78c1\u5834 \\( H \\) \u304c\u751f\u6210\u3055\u308c\u307e\u3059:<\/p>\n<p>\\( H = \\frac{I}{2\\pi r} \\)<\/p>\n<p>\u3053\u3053\u3067\u3001\\( r \\) \u306f\u96fb\u6d41\u304b\u3089\u306e\u8ddd\u96e2\u3067\u3059\u3002\u3053\u306e\u539f\u7406\u3092\u5229\u7528\u3057\u3066\u3001\u78c1\u6c17\u30d8\u30c3\u30c9\u3084\u305d\u306e\u4ed6\u306e\u78c1\u5834\u5236\u5fa1\u88c5\u7f6e\u304c\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u78c1\u5834\u306f\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u3068\u6a5f\u80fd\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u8981\u7d20\u3067\u3059\u3002\u78c1\u5834\u3092\u7cbe\u5bc6\u306b\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u3044\u8a18\u9332\u5bc6\u5ea6\u3068\u9ad8\u901f\u306a\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u5c06\u6765\u7684\u306b\u306f\u3001\u3055\u3089\u306b\u9ad8\u6027\u80fd\u306a\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u958b\u767a\u304c\u671f\u5f85\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u78c1\u5834\u304c\u78c1\u6c17\u30e1\u30e2\u30ea\u88c5\u7f6e\u306e\u8a2d\u8a08\u306b\u679c\u305f\u3059\u5f79\u5272\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3002\u78c1\u5834\u306e\u57fa\u672c\u539f\u7406\u3068\u305d\u306e\u5fdc\u7528\u65b9\u6cd5\u3092\u7c21\u5358\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[102],"tags":[],"class_list":["post-214554","post","type-post","status-publish","format-standard","hentry","category-102","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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