New production method makes crystalline microstructures universally usable

0
7


Spintronics: New production method makes crystalline microstructures universally usable
Pink: YIG-bridge, green: glue, gray: sapphire Credit: AIP Applied Physics Letters

New storage and information technology requires new higher performance materials. One of these materials is yttrium iron garnet, which has special magnetic properties. Thanks to a new process, it can now be transferred to any material. Developed by physicists at Martin Luther University Halle-Wittenberg (MLU), the method could advance the production of smaller, faster and more energy-efficient components for data storage and information processing. The physicists have published their results in the journal Applied Physics Letters.


Magnetic materials play a major role in the development of new storage and information technologies. Magnonics is an emerging field of research that studies spin waves in crystalline layers. Spin is a type of intrinsic angular momentum of a particle that generates a magnetic moment. The deflection of the spin can propagate waves in a solid body. “In magnonic components, electrons would not have to move to process information, which means they would consume much less energy,” explains Professor Georg Schmidt from the Institute of Physics at MLU. This would also make them smaller and faster than previous technologies.

But until now, it has been very costly to produce the materials needed for this. Yttrium iron garnet (YIG) is often used because it has the right magnetic properties. “The problem so far has been that the very thin, high-quality layers that are required can only be produced on a specific substrate and cannot be detached,” explains Schmidt. The substrate itself has unfavorable electromagnetic properties.

The have now resolved this issue by getting the material to form bridge-like structures. This enables it to be produced on the ideal substrate and later removed. “Then, in theory, these small platelets can be stuck to any material,” says Schmidt. The method was developed in his laboratory and is based on a manufacturing process that can be conducted at room temperature. In the current study, the scientists glued the platelets, which are only a few square micrometers in size, onto sapphire and then measured their properties. “We have also had good results at low temperatures,” says Schmidt. This is necessary for many high-frequency experiments carried out in quantum magnonics.

“The yttrium iron garnet platelets could also be glued to silicon, for example,” says Schmidt. This semiconductor is very frequently used in electronics. In addition, other thin-film microstructures of any shape can be produced from YIG. According to Schmidt, this is particularly exciting for hybrid components in which are coupled with electrical waves or mechanical vibrations.


New optical technique provides more efficient probe of nanomagnet dynamics


More information:
P. Trempler et al, Integration and characterization of micron-sized YIG structures with very low Gilbert damping on arbitrary substrates, Applied Physics Letters (2020). DOI: 10.1063/5.0026120

Provided by
Martin-Luther-Universität Halle-Wittenberg

Citation:
Spintronics: New production method makes crystalline microstructures universally usable (2021, February 23)
retrieved 23 February 2021
from https://phys.org/news/2021-02-spintronics-production-method-crystalline-microstructures.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





Source link

LEAVE A REPLY

Please enter your comment!
Please enter your name here