{"id":1659,"date":"2025-05-29T04:05:52","date_gmt":"2025-05-29T04:05:52","guid":{"rendered":"https:\/\/nbaem.com\/?p=1659"},"modified":"2025-09-17T07:39:03","modified_gmt":"2025-09-17T07:39:03","slug":"what-is-remanence","status":"publish","type":"post","link":"https:\/\/nbaem.com\/fa\/what-is-remanence\/","title":{"rendered":"What is remanence?"},"content":{"rendered":"

What is Remanence?<\/h1>\n

Ever wondered why a magnet stays magnetized long after it\u2019s removed from a magnetic field? That\u2019s remanence at work.<\/p>\n

Remanence, or residual magnetization (Br), is the level of magnetism a permanent magnet retains after the external magnetic field is removed.<\/strong><\/p>\n

\"35SH

35SH BH curve<\/p><\/div>\n

Let\u2019s dive deeper into this essential property of permanent magnets and how it relates to coercivity.<\/p>\n

what is remanence(Br)?<\/h2>\n

Magnets don\u2019t just \u201cforget\u201d their magnetism. Remanence shows how much magnetism remains in a material.<\/p>\n

Remanence (Br) is measured in Tesla or Gauss and indicates the strength of magnetism retained when the magnet is no longer exposed to an external magnetic field.<\/strong><\/p>\n

\"magnetic

magnetic hysteresis curve<\/p><\/div>\n

<\/h3>\n

The science of remanence<\/h3>\n

Remanence (Br) reflects how strongly a permanent magnet holds onto its magnetic properties after magnetizing. The magnet’s material composition, structure, and domain alignment determine its remanence.<\/p>\n

1. Why Br Matters<\/strong><\/h4>\n

Br is critical for applications that need a stable magnetic field without ongoing power. For example, in motors or generators, higher remanence means more consistent performance.<\/p>\n\n\n\n\n\n\n\n
Factor<\/th>\nHigh Remanence (Br) Magnets<\/th>\nLow Remanence (Br) Magnets<\/th>\n<\/tr>\n<\/thead>\n
Material Type<\/td>\nNdFeB, SmCo<\/td>\nAlnico, Ferrite<\/td>\n<\/tr>\n
Field Strength<\/td>\nStrong<\/td>\nWeaker<\/td>\n<\/tr>\n
Application Suitability<\/td>\nMotors, sensors, speakers<\/td>\nLow-cost applications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2. How Br is Measured<\/strong><\/h4>\n

Br is measured by magnetizing the sample to saturation, removing the external field, and recording the remaining magnetization.<\/p>\n

3. Material Considerations<\/strong><\/h4>\n

Materials like Neodymium-Iron-Boron (NdFeB)<\/strong><\/a> <\/span>offer high Br values, making them ideal for applications requiring strong, lasting magnetism. SmCo magnets also have high Br but with better temperature stability. On the other hand, Ferrite magnets have lower Br but are inexpensive and corrosion-resistant.<\/p>\n

In my business, I\u2019ve seen customers switch from Ferrite to NdFeB magnets for high-performance devices like drones and EVs because they need high Br for efficiency and compact design.<\/p>\n

Conclusion<\/h2>\n

Remanence tells us how well a permanent magnet retains its magnetism after magnetizing. It\u2019s key for choosing the right magnet for any application.<\/p>\n

","protected":false},"excerpt":{"rendered":"

What is Remanence? Ever wondered why a magnet stays magnetized long after it\u2019s removed from a magnetic field? That\u2019s remanence at work. Remanence, or residual magnetization (Br), is the level of magnetism a permanent magnet retains after the external magnetic field is removed. Let\u2019s dive deeper into this essential property […]<\/p>","protected":false},"author":1,"featured_media":1354,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/posts\/1659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/comments?post=1659"}],"version-history":[{"count":4,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/posts\/1659\/revisions"}],"predecessor-version":[{"id":1666,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/posts\/1659\/revisions\/1666"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/media\/1354"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/media?parent=1659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/categories?post=1659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/fa\/wp-json\/wp\/v2\/tags?post=1659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}