Husain Sajid, Harris Isaac, Meisenheimer Peter, Mantri Sukriti, Li Xinyan, Ramesh Maya, Behera Piush, Taghinejad Hossein, Kim Jaegyu, Kavle Pravin, Zhou Shiyu, Kim Tae Yeon, Zhang Hongrui, Stevenson Paul, Analytis James G, Schlom Darrell, Salahuddin Sayeef, Íñiguez-González Jorge, Xu Bin, Martin Lane W, Caretta Lucas, Han Yimo, Bellaiche Laurent, Yao Zhi, Ramesh Ramamoorthy
Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
Department of Physics, University of California, Berkeley, CA, USA.
Nat Commun. 2024 Jul 16;15(1):5966. doi: 10.1038/s41467-024-50180-9.
Antiferromagnets have attracted significant attention in the field of magnonics, as promising candidates for ultralow-energy carriers for information transfer for future computing. The role of crystalline orientation distribution on magnon transport has received very little attention. In multiferroics such as BiFeO the coupling between antiferromagnetic and polar order imposes yet another boundary condition on spin transport. Thus, understanding the fundamentals of spin transport in such systems requires a single domain, a single crystal. We show that through Lanthanum (La) substitution, a single ferroelectric domain can be engineered with a stable, single-variant spin cycloid, controllable by an electric field. The spin transport in such a single domain displays a strong anisotropy, arising from the underlying spin cycloid lattice. Our work shows a pathway to understanding the fundamental origins of magnon transport in such a single domain multiferroic.
反铁磁体在磁子学领域引起了极大关注，有望成为未来计算中用于信息传输的超低能量载体。晶体取向分布对磁子输运的作用却很少受到关注。在诸如BiFeO等多铁性材料中，反铁磁序与极性序之间的耦合对自旋输运施加了另一个边界条件。因此，要理解此类系统中自旋输运的基本原理，需要一个单畴单晶。我们表明，通过镧（La）替代，可以设计出具有稳定的单变体自旋摆线的单铁电畴，且可由电场控制。这种单畴中的自旋输运表现出强烈的各向异性，这源于潜在的自旋摆线晶格。我们的工作为理解此类单畴多铁性材料中磁子输运的基本起源提供了一条途径。
