Lecture image placeholder

Premium content

Access to this content requires a subscription. You must be a premium user to view this content.

Monthly subscription - $9.99Pay per view - $4.99Access through your institutionLogin with Underline account
Need help?
Contact us
Lecture placeholder background
VIDEO DOI: https://doi.org/10.48448/xf2v-zt54

technical paper

MMM 2022

November 07, 2022

Minneapolis, United States

The effect of x ray illumination on magnetic domain memory in [Co/Pd] / IrMn multilayers

We are studying the effect that illumination by coherent resonant x-rays may have on magnetic domain memory (MDM) in a Co/Pd / IrMn multilayers 1-3. MDM is the ability of the magnetic domains to retrieve their exact same domain topology upon field cycling. In the case of Co/Pd / IrMn multilayers, MDM is induced by exchange couplings between the Co/Pd ferromagnetic layer and the IrMn antiferromagnetic layer. We found that under high dose of x-ray illumination, the material may lose its existing MDM. To investigate this potential effect, we have used both x-ray resonant magnetic scattering (XRMS) along with magneto-transport measurements 4,5 to track the exchange bias while the sample is illuminated with x-rays, as illustrated in Figure 1. Magneto-transport is here used to measure the hysteresis loop of the multilayered material and observe exchange bias. A loss of exchange bias would indicate that the x-rays illumination dose may alter the strength of the exchange couplings and ultimately the amount of MDM. Knowing if a loss of exchange bias has occurred requires collecting magneto-transport data as well as XRMS data and correlating the observed changes under various dose of x-ray illumination. The data has been collected at different angles, different configurations, and different temperatures. These configurations consist of Hall effect measurements as well as magnetoresistance measurements. Also, data was collected using various sets of electrical contacts: a set of inner contacts around the x-ray transmission window and as set of outer contacts for reference. The outer contacts were located at a distance of ~1 cm whereas the spacing between inner contacts was ~100 microns. These measurements have been carried at BYU in order to better understand the shape of the data observed in-situ at the APS


1 K. Chesnel, A. Safsten, M. Rytting, and E.E. Fullerton, Nature Communications 7, (2016).
2 K. Chesnel, B. Wilcken, M. Rytting, S.D. Kevan, and E.E. Fullerton, New Journal of Physics 15, 023016(2013).
3 K. Chesnel, J. Nelson, B. Wilcken, and S.D. Kevan, Journal of Synchrotron Radiation 19, 293 (2012).
4 C. Hurd, Hall Effect in Metals and Alloys (Springer, 2012).
5 L.J. van der Pauw, A Method of Measuring Specific Resistivity and Hall Effect of Discs of Arbitrary Shape (1958).


Transcript English (automatic)

Next from MMM 2022

Control of Interface Anisotropy for Spin Transfer Torque in Perpendicular Magnetic Tunnel Junctions for Cryogenic Temperature Operation
technical paper

Control of Interface Anisotropy for Spin Transfer Torque in Perpendicular Magnetic Tunnel Junctions for Cryogenic Temperature Operation

MMM 2022

+6Liliana Buda-Prejbeanu
Pedro Brandao Veiga and 8 other authors

07 November 2022

Stay up to date with the latest Underline news!

Select topic of interest (you can select more than one)


  • All Lectures
  • For Librarians
  • Resource Center
  • Free Trial
Underline Science, Inc.
1216 Broadway, 2nd Floor, New York, NY 10001, USA

© 2023 Underline - All rights reserved