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Scientists have now discovered another class of particle-like magnetic object that could take the development of data storage devices a significant step forward. If skyrmions are used to encode the number ''1'', then the new objects could be used to encode the number ''0''." id="metasummary"/> <meta name="keywords" content="Spintronics; Medical Technology; Electronics; Telecommunications; Encryption; Hacking; Computers and Internet; Spintronics Research" id="metakeywords"/> <meta name="last-modified" content="Mon, 01 Apr 2019 21:26:45 GMT"/> <meta name="expires" content="Mon, 01 Apr 2019 22:26:45 GMT"/> <meta property="og:title" id="og_title" content="Magnetic skyrmions: Not the only ones of their class: New type of magnetic particle-like object for data storage devices of the future"/> <meta property="og:type" content="article"/> <meta property="og:url" id="og_url" content="https://web.archive.org/web/20190402125006/https://www.sciencedaily.com/releases/2018/06/180628131055.htm"/> <meta property="og:image" id="og_image" content="/web/20190402125006im_/https://www.sciencedaily.com/images/2018/06/180628131055_1_540x360.jpg"/> <meta property="og:description" id="og_description" content="Tiny magnetic vortex structures, so-called skyrmions, have been researched intensively for some time for future energy-efficient space-saving data storage devices. Scientists have now discovered another class of particle-like magnetic object that could take the development of data storage devices a significant step forward. 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}); </script> </div> </div> <div id="message_box" class="hidden-sm hidden-xs"> <div id="message">Follow all of ScienceDaily's <strong><a href="/web/20190402125006/https://www.sciencedaily.com/news/">latest research news</a></strong> and <strong><a href="/web/20190402125006/https://www.sciencedaily.com/news/top/science/" class="store">top science headlines</a></strong>!</div> </div> </div>  </header><div id="contents" class="container white"> <div class="row">  <div class="col-sm-8 main less-padding-right hyphenate">  <div class="head no-print"> <div class="pull-left head-left">Science News</div> <div class="pull-right head-right">from research organizations</div> </div> <div class="clearfix"></div> <hr class="head-rule no-print"/> <h1 id="headline" class="headline">Magnetic skyrmions: Not the only ones of their class</h1> <h2 id="subtitle" class="subtitle">New type of magnetic particle-like object for data storage devices of the future</h2> <dl class="dl-horizontal dl-custom"> <dt>Date:</dt> <dd id="date_posted">June 28, 2018</dd> <dt>Source:</dt> <dd id="source">Forschungszentrum Juelich</dd> <dt>Summary:</dt> <dd id="abstract">Tiny magnetic vortex structures, so-called skyrmions, have been researched intensively for some time for future energy-efficient space-saving data storage devices. Scientists have now discovered another class of particle-like magnetic object that could take the development of data storage devices a significant step forward. If skyrmions are used to encode the number ''1'', then the new objects could be used to encode the number ''0''. </dd> <dt class="no-print">Share:</dt> <dd class="no-print"> <div id="share_top"> <div data-url="https://web.archive.org/web/20190402125006oe_/https://www.sciencedaily.com/releases/2018/06/180628131055.htm" class="ssk-sm ssk-group"> <a class="ssk ssk-icon ssk-facebook"></a> <a class="ssk ssk-icon ssk-twitter"></a> <a class="ssk ssk-icon ssk-google-plus"></a> <a class="ssk ssk-icon ssk-pinterest"></a> <a class="ssk ssk-icon ssk-linkedin"></a> <a class="ssk ssk-icon ssk-email"></a> </div> </div> </dd> </dl> <div class="row"> <div class="col-md-8 col-md-push-4"> <div class="fullstory">FULL STORY</div> <hr class="hr-fullstory"/> <div id="story_photo" class="hyphenate"> <div class="photo-image"><img class="img-responsive center-block" src="/web/20190402125006im_/https://www.sciencedaily.com/images/2018/06/180628131055_1_540x360.jpg" width="" height="" title="Click to enlarge" alt="" data-toggle="modal" data-target="#myModal"/></div> <div class="photo-caption">Encoding digital data as a sequence of magnetic bobbers (foreground) and skyrmions (further back).</div> <div class="photo-credit"><em>Credit: Forschungszentrum Jülich/N. Kiselev</em></div> <div class="clearfix"></div>  <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-dialog modal-lg"> <div class="modal-content modal-content-custom"> <div class="modal-image"><img class="img-responsive center-block" src="/web/20190402125006im_/https://www.sciencedaily.com/images/2018/06/180628131055_1_900x600.jpg" width="1440" height="1919"/></div> <div class="modal-text"> <div class="modal-caption">Encoding digital data as a sequence of magnetic bobbers (foreground) and skyrmions (further back).</div> <div class="modal-credit"><em>Credit: Forschungszentrum Jülich/N. Kiselev</em></div> <div class="modal-close"><button type="button" class="btn btn-default" data-dismiss="modal">Close</button></div> <div class="clearfix"></div> </div> </div> </div> </div> </div>  <div class="clearfix"></div> <div id="story_text" class="hyphenate"> <p id="first" class="lead">These objects, which are referred to as "chiral magnetic bobbers," are three-dimensional magnetic structures that appear near the surfaces of certain alloys.</p> <div class="mobile-top-rectangle hidden-md hidden-lg"> <div class="textrule"> <span>advertisement</span> </div>  <div id="adslot-mobile-top-rectangle"> <script type="text/javascript"> googletag.cmd.push(function() { deployads.push(function() { deployads.gpt.display("adslot-mobile-top-rectangle") }); }); </script> </div> <hr class="hrrule"/> </div> <div id="text"> <p>"For a long time, the unique object for research in the field of chiral magnets was the magnetic skyrmion. We now provide a new object for investigation by researchers -- a chiral bobber -- which is characterized by a number of unique properties," says Dr. Nikolai Kiselev from Jülich's Peter Grünberg Institute (PGI-1). Three years ago, together with the institute's Director Prof. Stefan Blügel and other collaborators, they predicted the existence of this new class of magnetic structures theoretically. Now, researchers from the Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (Director Prof. Rafal E. Dunin-Borkowski and his colleagues) have succeeded in demonstrating the existence of chiral bobbers in a real material experimentally.</p> <p>The stability of magnetic structures such as skyrmions is related to a property of the material known as chirality. Just as a right hand cannot be converted into a left hand for reasons of symmetry, right-handed and left-handed magnetic structures cannot be converted into one another. Furthermore, both skyrmions and the newly-discovered chiral bobbers are very small, with diameters of typically only a few tens of nanometers. Therefore, they can in principle be used to pack data very densely on a memory chip. However, their small size makes their observation highly challenging. "The visualization of magnetic texture on such a small scale requires special state-of-the-art techniques that are accessible in only a few laboratories worldwide," explains Rafal Dunin-Borkowski.</p> <p>There is another important reason why magnetic solitons (another name for particle-like objects in nonlinear physics) such as skyrmions and chiral bobbers are so promising for applications. In contrast to data bits in hard disk drives, skyrmions are movable objects. Their motion along a guiding track in a chip can be induced by a very weak pulse of electrical current. This property provides new opportunities for the development of a completely new concept of magnetic solid-state memory -- the so-called skyrmion racetrack memory. "The mobility of skyrmions allows data to move from write to read elements without the need for any movable mechanical parts such as read and write heads and spining hard disk itself," explains Nikolai Kiselev. This capability saves energy because components that move generally require more energy, occupy more space and tend to be sensitive to mechanical vibrations and shocks. A new solid state magnetic memory would be free of such disadvantages.</p> <p>The newly discovered magnetic particles now make it possible to encode digital data directly with two different types of magnetic objects, namely with skyrmions and magnetic bobbers.</p> <p>"Until now, it was assumed that digital data should somehow be represented as a sequence of skyrmions and empty spaces," says Stefan Blügel. The distance between successive skyrmions then encodes binary information. However, it must then be controlled or quantized, so that no information is lost through spontaneous drift of the skyrmions. Instead, the newly discovered three-dimensional magnetic particles offer opportunities to encode digital data directly as a sequence of skyrmions and magnetic bobbers, which can each flow freely without needing to maintain precise distances between successive data bit carriers.</p> <p>Further research is required to develop practical applications. In the iron-germanium alloy studied by Nikolai Kiselev and his colleagues, the structures are only stable up to 200 Kelvin, which corresponds to -73.5 degrees Celsius. However, based on theoretical considerations, it is predicted that magnetic bobbers may also occur in other chiral magnets and, like some recently discovered species of skyrmions, may also exist at room temperature.</p> </div> <div class="mobile-middle-rectangle hidden-md hidden-lg"> <div class="textrule"> <span>advertisement</span> </div>  <div id="adslot-mobile-middle-rectangle"> <script type="text/javascript"> googletag.cmd.push(function() { deployads.push(function() { deployads.gpt.display("adslot-mobile-middle-rectangle") }); }); </script> </div> <hr class="hrrule"/> </div> <hr class="hidden-sm hidden-xs"/> <div id="story_source"> <p><strong>Story Source:</strong></p> <p><a href="https://web.archive.org/web/20190402125006/http://www.fz-juelich.de/SharedDocs/Pressemitteilungen/UK/EN/2018/notifications/2018-06-28-magnetic-bobbers.html" rel="nofollow" target="_blank">Materials</a> provided by <a href="https://web.archive.org/web/20190402125006/http://www.fz-juelich.de/" rel="nofollow" target="_blank"><strong>Forschungszentrum Juelich</strong></a>. <em>Note: Content may be edited for style and length.</em></p> </div>  <hr/> <div id="journal_references"><p><strong>Journal Reference</strong>:</p> <ol class="journal"> <li>Fengshan Zheng, Filipp N. Rybakov, Aleksandr B. Borisov, Dongsheng Song, Shasha Wang, Zi-An Li, Haifeng Du, Nikolai S. Kiselev, Jan Caron, András Kovács, Mingliang Tian, Yuheng Zhang, Stefan Blügel, Rafal E. Dunin-Borkowski. <strong>Experimental observation of chiral magnetic bobbers in B20-type FeGe</strong>. <em>Nature Nanotechnology</em>, 2018; 13 (6): 451 DOI: <a href="https://web.archive.org/web/20190402125006/http://dx.doi.org/10.1038/s41565-018-0093-3" rel="nofollow" target="_blank">10.1038/s41565-018-0093-3</a> </li> </ol> <hr/> </div>  <div id="citations"> <div role="tabpanel" class="right-tabs clearfix"> <p class="pull-left"><strong>Cite This Page</strong>:</p>  <ul class="nav nav-tabs" role="tablist"> <li role="presentation" class="active"><a href="#citation_mla" aria-controls="citation_mla" role="tab" data-toggle="tab">MLA</a></li> <li role="presentation"><a href="#citation_apa" aria-controls="citation_apa" role="tab" data-toggle="tab">APA</a></li> <li role="presentation"><a href="#citation_chicago" aria-controls="citation_chicago" role="tab" data-toggle="tab">Chicago</a></li> </ul> <div class="tab-content tab-citations"> <div role="tabpanel" class="tab-pane active" id="citation_mla">Forschungszentrum Juelich. "Magnetic skyrmions: Not the only ones of their class: New type of magnetic particle-like object for data storage devices of the future." ScienceDaily. ScienceDaily, 28 June 2018. <www.sciencedaily.com/releases/2018/06/180628131055.htm>.</div> <div role="tabpanel" class="tab-pane" id="citation_apa">Forschungszentrum Juelich. (2018, June 28). Magnetic skyrmions: Not the only ones of their class: New type of magnetic particle-like object for data storage devices of the future. <em>ScienceDaily</em>. Retrieved April 1, 2019 from www.sciencedaily.com/releases/2018/06/180628131055.htm</div> <div role="tabpanel" class="tab-pane" id="citation_chicago">Forschungszentrum Juelich. "Magnetic skyrmions: Not the only ones of their class: New type of magnetic particle-like object for data storage devices of the future." 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