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Controlling magnetization by surface acoustic waves

Date:
May 27, 2021
Source:
Tohoku University
Summary:
Using the circular vibration of surface acoustic waves, a collaborative research group have successfully controlled the magnetization of a ferromagnetic thin film.
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Using the circular vibration of surface acoustic waves, a collaborative research group have successfully controlled the magnetization of a ferromagnetic thin film.

Their research was published in the journalNature Communicationson May 10, 2021.

Essentially, acoustic waves are waves of atomic vibrations in a substance. When the waves propagate across the surface of a material, the vibration becomes circular. This circular motion, known as angular momentum, can help measure rotational motion.

Surface acoustic waves are utilized in bandpass filters in cell phones. The bandpass allows certain frequencies in and keeps unneeded frequencies out. However, storage devices in computers are composed of ferromagnets.

"We wondered whether the surface acoustic waves could control another form of angular momentum: an electron's spin -- the source of magnetism," said, coauthor of the study Ryo Sasaki, a graduate student at the University of Tokyo and concurrently a special research student at Tohoku University.

Sasaki worked alongside Yoichi Nii and Yoshinori Ononse, assistant and full professor at Tohoku University's Institute of Materials Research.

在一起,他们能够控制magnetization of a ferromagnetic thin film using the angular momentum transfer from surface acoustic wave to ferromagnetic spin moments.

Our discovery opens up new avenues for combining and developing acoustic and magnetic devices," added Sasaki.

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Materialsprovided byTohoku University.Note: Content may be edited for style and length.


Journal Reference:

  1. R. Sasaki, Y. Nii, Y. Onose.Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments.Nature Communications, 2021; 12 (1) DOI:10.1038/s41467-021-22728-6

Cite This Page:

Tohoku University. "Controlling magnetization by surface acoustic waves." ScienceDaily. ScienceDaily, 27 May 2021. .
Tohoku University. (2021, May 27). Controlling magnetization by surface acoustic waves.ScienceDaily. Retrieved July 28, 2023 from www.koonmotors.com/releases/2021/05/210527112515.htm
Tohoku University. "Controlling magnetization by surface acoustic waves." ScienceDaily. www.koonmotors.com/releases/2021/05/210527112515.htm (accessed July 28, 2023).

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