Regensburg 2022 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 13: Magnonics 1
MA 13.10: Talk
Tuesday, September 6, 2022, 11:45–12:00, H43
New magnetostatic modes in biaxial magnets — •Yue Sun1,2, Changmin Lee2, Linda Ye3, Shingo Toyoda1,2, Veronika Sunko1,2, Joseph Checkelsky4, and Joseph Orenstein1,2 — 1University of California, Berkeley, Berkeley, California, USA — 2Lawrence Berkeley National Laboratory, Berkeley, California, USA — 3Stanford University, Stanford, California, USA — 4Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Easy-plane antiferromagnets have been demonstrated to have long-distance magnon propagation and flexible control of ultrafast magnetic dynamics. However, exact XY systems are rare, and it is common to have a small in-plane crystalline easy-axis, which leads to the great interest in biaxial magnets. Spin superfluidity has been predicted in biaxial antiferromagnet in an applied magnetic field. Here, we discover new magnetostatic modes in both biaxial ferromagnet and antiferromagnet, where the interesting biaxial anisotropy opens new ranges for magnon frequency. We observe the new magnetostatic modes in biaxial ferromagnet Fe3Sn2, and the prediction of the magnetostatic modes in biaxial antiferromagnet matches with the experimental observations in CrSBr. Comparing to the spin wave induced by the exchange interaction, the magnetostatic modes dominate in the long wavelength limit and offer a unique possibility to observe magnon Bose-Einstein condensation in biaxial antiferromagnet.