Wydarzenia

Seminarium Oddziału Badań Magnetyków

Exploring low-net-moment magnets for spintronics

Yong-Chang Lau

Institute of Physics, Chinese Academy of Sciences

In modern spintronic devices, ferromagnetic metals such as CoFeB play a crucial role in polarizing conduction electrons and enabling information storage. However, as the demand for higher storage density and faster operating speeds continues to grow, ferrimagnetic and antiferromagnetic metals, which exhibit a vanishing net magnetic moment and thus produce no stray fields, have emerged as a promising alternative. These low-moment magnets, featuring strong antiferromagnetic intersublattice coupling, offer the potential for higher switching speeds and lower power consumption compared to state-of-the-art ferromagnetic metals. During my talk, I will present our investigations into the anomalous Hall effect of chiral antiferromagnetic Mn3-xGa [1] and the short-period helimagnetic order of metamagnetic MnCoSi [2]. Our recent findings on antiferromagnetic half-Heusler family RAuSn (R = rare earth) will also be discussed.

References:

[1] L. Song et al., Large Anomalous Hall Effect at Room Temperature in a Fermi-level-tuned Kagome Antiferromagnet, Adv. Funct. Mater. 34, 2316588 (2024)

[2] B. Ding et al., Observation of Short-Period Helical Spin Order and Magnetic Transition in a Nonchiral Centrosymmetric Helimagnet, Adv. Funct. Mater. 32, 220035 (2022); B. Ding et al., Modulating nanometric spin spiral states via spontaneous lattice distortion in a short period helimagnet MnCoSi, ACS Nano (In press)