{"id":209415,"date":"2024-03-21T14:07:54","date_gmt":"2024-03-21T14:07:54","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e3%83%ad%e3%83%b3%e3%83%89%e3%83%b3%e6%b5%b8%e9%80%8f%e6%b7%b1%e3%81%95%e6%96%b9%e7%a8%8b%e5%bc%8f-%e8%a7%a3%e8%aa%ac%e3%81%a8%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:12:18","modified_gmt":"2024-05-17T15:12:18","slug":"%e3%83%ad%e3%83%b3%e3%83%89%e3%83%b3%e6%b5%b8%e9%80%8f%e6%b7%b1%e3%81%95%e6%96%b9%e7%a8%8b%e5%bc%8f-%e8%a7%a3%e8%aa%ac%e3%81%a8%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e3%83%ad%e3%83%b3%e3%83%89%e3%83%b3%e6%b5%b8%e9%80%8f%e6%b7%b1%e3%81%95%e6%96%b9%e7%a8%8b%e5%bc%8f-%e8%a7%a3%e8%aa%ac%e3%81%a8%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u65b9\u7a0b\u5f0f | \u89e3\u8aac\u3068\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u65b9\u7a0b\u5f0f\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u8d85\u4f1d\u5c0e\u4f53\u5185\u3067\u306e\u78c1\u5834\u306e\u6e1b\u8870\u8ddd\u96e2\u3092\u793a\u3059\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3001\u5fdc\u7528\u4f8b\u3082\u7d39\u4ecb\u3002<\/p>\n<h2>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u65b9\u7a0b\u5f0f | \u89e3\u8aac\u3068\u5fdc\u7528<\/h2>\n<p>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\uff08London penetration depth\uff09\u306f\u3001\u8d85\u4f1d\u5c0e\u4f53\u306b\u304a\u3044\u3066\u3001\u78c1\u5834\u304c\u6e1b\u8870\u3059\u308b\u8ddd\u96e2\u3092\u8868\u3059\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3059\u3002\u3053\u306e\u6982\u5ff5\u306f\u30011935\u5e74\u306b\u30d5\u30ea\u30c3\u30c4\u30fb\u30ed\u30f3\u30c9\u30f3\u3068\u30cf\u30a4\u30f3\u30c4\u30fb\u30ed\u30f3\u30c9\u30f3\u306e\u5144\u5f1f\u306b\u3088\u3063\u3066\u63d0\u5531\u3055\u308c\u307e\u3057\u305f\u3002\u30ed\u30f3\u30c9\u30f3\u65b9\u7a0b\u5f0f\u306b\u3088\u308a\u3001\u8d85\u4f1d\u5c0e\u4f53\u5185\u306e\u96fb\u6d41\u3068\u78c1\u5834\u306e\u95a2\u4fc2\u304c\u8a18\u8ff0\u3055\u308c\u3001\u3053\u306e\u6d78\u900f\u6df1\u3055\u304c\u5b9a\u91cf\u7684\u306b\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30ed\u30f3\u30c9\u30f3\u65b9\u7a0b\u5f0f\u3068\u306f<\/h2>\n<p>\u307e\u305a\u3001\u30ed\u30f3\u30c9\u30f3\u65b9\u7a0b\u5f0f\u3092\u7d39\u4ecb\u3057\u307e\u3057\u3087\u3046\u3002\u30ed\u30f3\u30c9\u30f3\u65b9\u7a0b\u5f0f\u306f\u4ee5\u4e0b\u306e\u5f62\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\n\\[<br \/>\n\\nabla \\times \\mathbf{J} = -\\frac{n_s e^2}{m} \\mathbf{B}<br \/>\n\\]\n<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li>\\(\\mathbf{J}\\) \u306f\u96fb\u6d41\u5bc6\u5ea6\uff08A\/m\u00b2\uff09<\/li>\n<li>\\(n_s\\) \u306f\u8d85\u4f1d\u5c0e\u4f53\u5185\u306e\u30af\u30fc\u30d1\u30fc\u5bfe\u306e\u5bc6\u5ea6\uff08\/m\u00b3\uff09<\/li>\n<li>\\(e\\) \u306f\u96fb\u5b50\u306e\u96fb\u8377\uff08C\uff09<\/li>\n<li>\\(m\\) \u306f\u96fb\u5b50\u306e\u8cea\u91cf\uff08kg\uff09<\/li>\n<li>\\(\\mathbf{B}\\) \u306f\u78c1\u675f\u5bc6\u5ea6\uff08T\uff09<\/li>\n<\/ul>\n<h2>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u3068\u306f<\/h2>\n<p>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055 \\(\\lambda_L\\) \u306f\u3001\u8d85\u4f1d\u5c0e\u4f53\u306e\u4e2d\u3067\u78c1\u5834\u304c\u6307\u6570\u95a2\u6570\u7684\u306b\u6e1b\u5c11\u3059\u308b\u8ddd\u96e2\u3092\u793a\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u8d85\u4f1d\u5c0e\u4f53\u5185\u90e8\u3067\u78c1\u5834\u306f\u6b21\u306e\u3088\u3046\u306b\u6e1b\u8870\u3057\u307e\u3059\u3002<\/p>\n<p>\n\\[<br \/>\nB(x) = B_0 e^{-x \/ \\lambda_L}<br \/>\n\\]\n<\/p>\n<p>\u3053\u3053\u3067\u3001\\(B(x)\\) \u306f\u6df1\u3055 \\(x\\) \u3067\u306e\u78c1\u5834\u3001\\(B_0\\) \u306f\u8d85\u4f1d\u5c0e\u4f53\u306e\u8868\u9762\u3067\u306e\u78c1\u5834\u306e\u5f37\u3055\u3067\u3059\u3002\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055 \\(\\lambda_L\\) \u306f\u4ee5\u4e0b\u306e\u5f0f\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\n\\[<br \/>\n\\lambda_L = \\sqrt{\\frac{m}{\\mu_0 n_s e^2}}<br \/>\n\\]\n<\/p>\n<p>\u3053\u3053\u3067\u3001\\(\\mu_0\\) \u306f\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff084\u03c0 \u00d7 10\u207b\u2077 H\/m\uff09\u3067\u3059\u3002\u900f\u78c1\u7387\u306f\u78c1\u5834\u304c\u5a92\u8cea\u4e2d\u3092\u901a\u904e\u3059\u308b\u969b\u306e\u62b5\u6297\u306e\u5c11\u306a\u3055\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u306e\u5fdc\u7528<\/h2>\n<p>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3055\u307e\u3056\u307e\u306a\u5fdc\u7528\u5206\u91ce\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h3>1. \u8d85\u4f1d\u5c0e\u6750\u6599\u306e\u8a2d\u8a08<\/h3>\n<p>\u8d85\u4f1d\u5c0e\u6750\u6599\u306e\u7279\u6027\u3092\u7406\u89e3\u3057\u3001\u8a2d\u8a08\u3059\u308b\u4e0a\u3067\u3001\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u306f\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u304c\u77ed\u3044\u6750\u6599\u306f\u3001\u5f37\u3044\u78c1\u5834\u306e\u4e0b\u3067\u3082\u8d85\u4f1d\u5c0e\u72b6\u614b\u3092\u7dad\u6301\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>2. \u533b\u7642\u7528MRI<\/h3>\n<p>\u8d85\u4f1d\u5c0e\u30b3\u30a4\u30eb\u306f\u9ad8\u3044\u78c1\u5834\u3092\u751f\u6210\u3059\u308b\u80fd\u529b\u304c\u3042\u308b\u305f\u3081\u3001\u533b\u7642\u7528MRI\uff08\u78c1\u6c17\u5171\u9cf4\u753b\u50cf\u88c5\u7f6e\uff09\u306e\u30b3\u30a2\u6280\u8853\u306e\u4e00\u90e8\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u6280\u8853\u306b\u306f\u3001\u8d85\u4f1d\u5c0e\u4f53\u306e\u78c1\u5834\u7279\u6027\u306b\u95a2\u3059\u308b\u7406\u89e3\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3>3. \u91cf\u5b50\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h3>\n<p>\u91cf\u5b50\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30af\u30d3\u30c3\u30c8\u306b\u306f\u3001\u8d85\u4f1d\u5c0e\u4f53\u3092\u5229\u7528\u3057\u305f\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u91cf\u5b50\u30c7\u30b3\u30d2\u30fc\u30ec\u30f3\u30b9\u3092\u6291\u5236\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b0\u305f\u306a\u6750\u6599\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u306f\u3001\u8d85\u4f1d\u5c0e\u306e\u5206\u91ce\u306b\u304a\u3051\u308b\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u5fdc\u7528\u304c\u671f\u5f85\u3055\u308c\u308b\u91cd\u8981\u306a\u7269\u7406\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3059\u3002\u8d85\u4f1d\u5c0e\u4f53\u306e\u8a2d\u8a08\u304b\u3089\u533b\u7642\u3001\u91cf\u5b50\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u81f3\u308b\u307e\u3067\u3001\u7406\u89e3\u3068\u5fdc\u7528\u306e\u5e45\u306f\u5e83\u304c\u308a\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u57fa\u790e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u3055\u3089\u306a\u308b\u6280\u8853\u9769\u65b0\u306b\u8ca2\u732e\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30ed\u30f3\u30c9\u30f3\u6d78\u900f\u6df1\u3055\u65b9\u7a0b\u5f0f\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u8d85\u4f1d\u5c0e\u4f53\u5185\u3067\u306e\u78c1\u5834\u306e\u6e1b\u8870\u8ddd\u96e2\u3092\u793a\u3059\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3001\u5fdc\u7528\u4f8b\u3082\u7d39\u4ecb\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":[96],"tags":[97],"class_list":["post-209415","post","type-post","status-publish","format-standard","hentry","category-96","tag-97","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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