Sub-picosecond magnetization reversal in rare-earth-free spin valves
The date of：
2023-03-17
viewed:
1
Researchers at the Université de Lorraine in France and Tohoku University in Japan have demonstrated a sub-picosecond magnetization reversal in rare-earth-free archetypical spin valves. Their discovery was published in the journal Nature Materials on March 9, 2023.Manipulating magnetic materials without using magnetic fields is of paramount importance for many applications, such as non-volatile memory. Two decades ago, it was discovered that a magnetization reversal could be induced by a charge current. A decade later, a much faster, sub-picosecond control of the magnetization was achieved by shining femtosecond light pulses. This process became known as all-optical magnetization switching. However, only a few specific rare-earth-based material systems containing antiparallel alignment in magnetic sub-lattices experience such ultrafast phenomena.In their work, the research group demonstrated sub-picosecond optical control of magnetization in rare-earth-free archetypical spintronic structures, consisting of [Pt/Co]/Cu/[Co/Pt], at ultrafast timescales.Furthermore, they observed magnetization reversal from parallel alignment, which was previously unseen and unexpected in ultrafast magnetism. Like the discovery of magnetization reversal by a charge current two decades ago, this breakthrough has the potential to drastically extend the bandwidth of common spintronic devices. This can be done by exploiting common spintronics phenomena in a strongly out-of-equilibrium context.'Our findings provide a route for ultrafast magnetization control by bridging concepts from spintronics and ultrafast magnetism,' says Dr. Junta Igarashi of the Université de Lorraine (JSPS Overseas Research Fellowships, an alumnus of Tohoku University) and first author of the paper.Professor Stéphane Mangin of the Université de Lorraine, also serving as a visiting professor at the Center for Science and Innovation in Spintronics (CSIS), Tohoku University, added, 'Our findings are a milestone in the development of ultra-fast spintronics and could open the way to new applications for ultra-fast and energy efficient memories.'
Hot News
/
Related to recommend
2023
-
09
-
26
Click on the number of times:
0
source:SASKTODAYREGINA — Immigration and Career Training and Trade and Export Development Minister Jeremy Harrison, is leading a delegation to the United Kingdom (UK) and Poland.The mission's focu...
2023
-
09
-
25
Click on the number of times:
0
source:malaymailKUALA LUMPUR, Sept 21 — A member of the Dewan Negara suggested today that the government set up an agency, body or government-linked company (GLC) to supervise and manage all rare eart...
2023
-
09
-
22
Click on the number of times:
0
source:subscribeOD6 Metals looks set to turbocharge the hulking resource at its Splinter Rock project in Esperance after revealing new rare earths assays with grades of up to 4159 parts per million to...
2023
-
09
-
21
Click on the number of times:
0
source:FastmarketsOffshore wind capacity targets – that might see ninefold growth in installations by 2030 – are under threat without global changes in policy, financing and managing supply chain risk...