Debasmita Banerjee
Debasmita Banerjee
24 May 2016

Physicists Develop The World's First Artificial Rewritable Magnetic Charge Ice

Scientists from the University of Notre Dam have recently engineered the world's first rewritable magnetic charge ice with the help of the principles of quantum mechanics. Speculatively, the output product will have immense application in fields such as encryption methodology, magnonics (an emerging field of solid state physics) and spintronics , which would even benefit second degree derived objects of quantum computation.

Team leader, physicist- Dr. Yong-lei Wang along with his team have envisioned a completely futuristic approach to fabricate artificial spin ices with customizable magnetic order states corresponding to magnetic moment-wave interaction. This theorized results have successfully given birth to a magnetic meta-material featuring eight different types of magnetic charge orientation. Such a product has unanimously built the first rewritable magnetic charge ice, following the "two-positive two-negetive" charge ice rule.

Magnetic Force Microscopy Image of "ND" (Notre Dam written) Charge Ice

Arguably, this could also hint that magnetic monopoles in fact could exist and the well-known String theory might even gather support of it's validity. Putting their primary objective first, the related paper shows a methodical way to transform charge, ordering in a local and global manner. Major roles of the magnetic ice are the"read-erase-write" cycle, and it performs all of them at room temperature.

Artificial spin ice is a lithographically printed object which does not have one fixed minimum energy state which means that due to frustrated interactions, the ice does not completely freeze. The objects possesses spin degrees of freedom. In this case, among the geometrically anisotropic nanosacled units, the elongated one creates a single magnetic domain which exhibits a"macro spin" property fused with a binary degree of freedom.

The artifical spin concept is introduced to study how magnetism works in crystals. Also, taking advantage of their configuration it could be used to devise storage chips. Experimentally, the team concentrated on the associated charges with magnetic ice, instead of spin and optimised it as artificial charge ice.

Zhili Xiao, a co-author asserted that their discovery is correlated with the invention of smart materials, as artificial spin ices slowly discover their functionality. The team engraved ND using excited magnetic state (initials of Notre Dam) on the ground stated background. Also, the integrated system could work at a whole new level while blending with super conductors and could be proven to be instrumental in designing hybrid structures. The complete research has been published in "Science" Journal.

Source: Science

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