jems 2020 mini banner 01

3947 - Ab initio calculation of the DzyaloshinskiiMoriya interaction in corre...

More
7 months 2 weeks ago - 7 months 2 weeks ago #392 by SofiaAbrunhosa
Oral Presentation
Thursday, December 10
Speaker: Vladislav Borisov
Full Title: Ab initio calculation of the DzyaloshinskiiMoriya interaction in correlated magnetic systems
Last edit: 7 months 2 weeks ago by SofiaAbrunhosa.

Please Log in or Create an account to join the conversation.

More
7 months 2 weeks ago - 7 months 2 weeks ago #498 by SofiaAbrunhosa
Session questions:
  1. What is the value of the spin moment of MnSi from your calculations and how does it compare with the experimental value? Could this affect the computed magnetic interactions?
  2. What is the structure of Co in DMI calculation? FCC or HCP?

We kindly ask the speakers to reply to any questions left unanswered during the talk.
Last edit: 7 months 2 weeks ago by SofiaAbrunhosa.

Please Log in or Create an account to join the conversation.

More
7 months 1 week ago #661 by vborisov
Thank you for these questions. I reply to them further below:

1. For MnSi, we get a spin moment of 1.0 Bohr magneton per formula unit (arXiv:2011.08209), which is above the measured value of 0.4 Bohr magneton in the magnetically ordered phase (Ziebeck et al., Z. Phys. B - Condensed Matter 48, 241-250 (1982)). In that experimental paper, the effective moment around 1.0 Bohr magneton was found, however, at higher temperatures, suggesting that this system requires a more sophisticated theoretical description. The calculated magnetic interaction is roughly proportional to the square of the magnetic moment, which means that the correct moment would dramatically reduce the magnitude of the Heisenberg exchange, leading to a better estimate of the Curie temperature, for example.

2. If the question refers to the Co/Pt(111) system, then Co forms a monolayer with a structure corresponding to a monoatomic triangular lattice. If the question refers to the bulk CoPt alloy, then the crystal lattice is cubic where Co is in the corners of the cube and Pt is near the center but shifted along the [001] direction.

Kind regards,
Vladislav Borisov

Please Log in or Create an account to join the conversation.

Time to create page: 0.177 seconds

Organization

INESC MN logo

Abreu Events - Lisbon Office

For general information about the congress, including registration, please contact us at:
 This email address is being protected from spambots. You need JavaScript enabled to view it.
 +351 21 415 6120