{"id":25681,"date":"2025-02-09T16:19:26","date_gmt":"2025-02-09T10:34:26","guid":{"rendered":"https:\/\/www.revoscience.com\/en\/?p=25681"},"modified":"2025-02-09T16:19:29","modified_gmt":"2025-02-09T10:34:29","slug":"breakthrough-in-opto-magnetic-technology-5-fold-increase-in-torque-efficiency","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/breakthrough-in-opto-magnetic-technology-5-fold-increase-in-torque-efficiency\/","title":{"rendered":"Breakthrough in Opto-Magnetic Technology: 5-Fold Increase in Torque Efficiency"},"content":{"rendered":"\n
\"\"
Examples of experimental data on magnetization oscillation driven by opto- magnetic torque measured by the pump-probe time-resolved magneto-optical Kerr effect: (a) Cobalt nano-thin film; (b) Cobalt-Platinum nano-thin film (Platinum concentration is 65% atomic ratio); (c) Platinum concentration dependence of the magnitude of opto-magnetic torques evaluated from the measured magnetization oscillations. Both the in-plane and out-of-plane torques increase with the platinum concentration.
<\/sup><\/em><\/figcaption><\/figure>\n\n\n\n

Researchers at Tohoku University have achieved a significant advancement in opto-magnetic technology, observing an opto-magnetic torque approximately five times more efficient than in conventional magnets. This breakthrough, led by Mr. Koki Nukui, Assistant Professor Satoshi Iihama, and Professor Shigemi Mizukami, has far-reaching implications for the development of light-based spin memory and storage technologies.<\/p>\n\n\n\n

Opto-magnetic torque is a method that can generate force on magnets. This can be used to change the direction of magnets by light more efficiently. By creating alloy nanofilms with up to 70% platinum dissolved in cobalt, the team discovered that the unique relativistic quantum mechanical effects of platinum significantly boosts the magnetic torque. The study revealed that the enhancement of opto-magnetic torque was attributed to the electron orbital angular momentum generated by circularly polarized light and relativistic quantum mechanical effects.<\/p>\n\n\n\n

This achievement allows for the same opto-magnetic effect to be produced with only one-fifth of the previous light intensity, paving the way for more energy-efficient opto-magnetic devices. The findings not only provide new insights into the physics of electron orbital angular momentum in metallic magnetic materials but also contribute to the development of high-efficiency spin memory and storage technologies that use light to write information.<\/p>\n\n\n\n

“These improvements could result in faster and more energy-efficient devices in the future,” explains Mizukami.<\/p>\n\n\n\n

The research aligns with the growing interest in opto-electronic fusion technologies, combining electronic and optical technologies for next-generation applications. This discovery marks a significant step forward in controlling nanomagnetic materials using light and magnetism.<\/p>\n\n\n\n

These findings were published in Physical Review Letters<\/em> on January 2, 2025.<\/p>\n","protected":false},"excerpt":{"rendered":"

Researchers at Tohoku University have achieved a significant advancement in opto-magnetic technology, observing an opto-magnetic torque approximately five times more efficient than in conventional magnets. This breakthrough, led by Mr. Koki Nukui, Assistant Professor Satoshi Iihama, and Professor Shigemi Mizukami, has far-reaching implications for the development of light-based spin memory and storage technologies. Opto-magnetic torque […]<\/p>\n","protected":false},"author":2,"featured_media":25682,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-25681","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",768,381,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-200x200.jpg",200,200,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-675x335.jpg",675,335,true],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",750,372,false],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-675x335.jpg",675,335,true],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",768,381,false],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",768,381,false],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",768,381,false],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",768,381,false],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-600x381.jpg",600,381,true],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-600x381.jpg",600,381,true],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-760x381.jpg",760,381,true],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-550x360.jpg",550,360,true],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph-95x65.jpg",95,65,true],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",640,318,false],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",96,48,false],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2025\/02\/opto-magnatic-torque-graph.jpg",150,74,false]},"author_info":{"info":["RevoScience"]},"category_info":"Research<\/a>","tag_info":"Research","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/25681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=25681"}],"version-history":[{"count":1,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/25681\/revisions"}],"predecessor-version":[{"id":25683,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/25681\/revisions\/25683"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/25682"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=25681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=25681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=25681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}