Astrology

Researchers discover 2-D magnet for first time

Agency | June 11, 2017 09:51 AM

San Francisco, A team of researchers has for the first time discovered magnetism in the 2-D world of monolayers, or materials that are formed by a single atomic layer.

The findings, published this week in the journal Nature, demonstrate that magnetic properties can exist even in the 2-D realm, opening a world of potential applications, as magnetic materials form the basis of technologies that play increasingly pivotal roles in our lives today, Xinhua news agency reported.

"What we have discovered here is an isolated 2-D material with intrinsic magnetism, and the magnetism in the system is highly robust," said Xiaodong Xu, a professor of physics and of materials science and engineering at the University of Washington (UW).

"We envision that new information technologies may emerge based on these new 2-D magnets."

Xu and Massachusetts Institute of Technology (MIT) physics professor Pablo Jarillo-Herrero led the international team of researchers who proved that the material, chromium triiodide, or CrI3, has magnetic properties in its monolayer form.

Other groups, including co-author Michael McGuire at the Oak Ridge National Laboratory, which is managed for the US Department of Energy, had previously shown that CrI3, in its multilayered, 3-D, bulk crystal form, is ferromagnetic.

In ferromagnetic materials, the "spins" of constituent electrons, analogous to tiny, subatomic magnets, align in the same direction even without an external magnetic field.

However, no 3-D magnetic substance had previously retained its magnetic properties when thinned down to a single atomic sheet.

Atoms within monolayer materials are considered "functionally" two-dimensional because the electrons can only travel within the atomic sheet, like pieces on a chessboard.

The researchers used a special type of microscopy to detect a signature in CrI3, as in other ferromagnetic materials when a beam of polarised light is reflected off the material's surface, indicative of intrinsic ferromagnetism in an isolated monolayer.

And surprisingly, in CrI3 flakes that are two layers thick, the telltale optical signature disappeared. This indicates that the electron spins are oppositely aligned to one another, a term known as anti-ferromagnetic ordering. Ferromagnetism returned in three-layer CrI3.

Have something to say? Post your comment
Must Read
Punjab Cabinet paves way for distriution of 1.73 lakh smart phones for Class XII Govt school students by November
Punjab Cabinet paves way for distriution of 1.73 lakh smart phones for Class XII Govt school students by November
A Sikh Congress leader Sardar Buta Singh had mooted the idea of Hindus claiming the ownership of disputed land which paved way for construction of temple at Ayodhya
A Sikh Congress leader Sardar Buta Singh had mooted the idea of Hindus claiming the ownership of disputed land which paved way for construction of temple at Ayodhya
Lupin launches Favipiravir in India for COVID treatment at Rs 49 per tablet
Lupin launches Favipiravir in India for COVID treatment at Rs 49 per tablet
Canal department Patwari of Hari Ke village of Muktsar, Ziledar of Kotkapura nabbed red handed by vigilance bureau unit Muktsar accepting Rs 13000 red handed
Canal department Patwari of Hari Ke village of Muktsar, Ziledar of Kotkapura nabbed red handed by vigilance bureau unit Muktsar accepting Rs 13000 red handed
Governor administers oath to chairman and members of water regulation & development authority in the presence of CM and water resources Minister
Governor administers oath to chairman and members of water regulation & development authority in the presence of CM and water resources Minister
Will write to Sonia to seek strict action against back-stabbing Bajwa & Dullo, says Jakhar
Will write to Sonia to seek strict action against back-stabbing Bajwa & Dullo, says Jakhar
Raksha Bandhan observed in jails with full adherence to COVID-19 norms
Raksha Bandhan observed in jails with full adherence to COVID-19 norms
Rajya Sabha Member Amar Singh Dies At 64
Rajya Sabha Member Amar Singh Dies At 64
Punjab CM advises shop owners to give free masks with purchase of Sweets/Rakhis on Raksha Bandhan
Punjab CM advises shop owners to give free masks with purchase of Sweets/Rakhis on Raksha Bandhan
Capt Amarinder directs CPSCM to designate officer to keep PYC informed on govt achievements & important issues like Bargari
Capt Amarinder directs CPSCM to designate officer to keep PYC informed on govt achievements & important issues like Bargari
40 Covid recovered Punjab Police personnel offer to donate plasma in response to CM’s appeal
40 Covid recovered Punjab Police personnel offer to donate plasma in response to CM’s appeal
World Hepatitis Day: Gastro forum launches free Hepatitis Helpline
World Hepatitis Day: Gastro forum launches free Hepatitis Helpline