Context of project
Arguably, one of the most enlightening works by the late physicist Charles Kittel is the theoretical description of the ferromagnetic resonance absorption, published first in 1947 [1] and extended to shape anistropies in 1948 [2]. At these early works, Kittel described the magnetization dynamics exerted in a ferromagnetic specimen at resonance conditions. Nowadays, the FMR is a versatile tool that allows studying magnetization dynamics in thin films, spin waves, magnetization switching and spin pumping. Remarkably, 10 years after his description of FMR, it was the same Charles Kittel who first formulated the coupling of spin waves (magnons) and lattice vibrations (phonons) at resonance conditions, giving origin to the acoustic excited FMR [3]. Kittel's early works reference: [1] journals.aps.org/pr/abstract/10.1103/PhysRev.71.270.2 [2] https://journals.aps.org/pr/abstract/10.1103/PhysRev.73.155 [3] https://journals.aps.org/pr/abstract/10.1103/PhysRev.110.836 Our contribution In the context of an invited contribution to the special issue on voltage control of nanomagnetism in the Journal of Physics D of the Institute of Physics (IOP), we published an overview of the current state of acoustic ferromagnetic resonance, a field we have been contributing in the last years. Our overview gives first a description of the mechanism of acoustic ferromagnetic resonance excited by surface acoustic waves, then we describe the generation of spin currents by a mechanism called acoustic spin pumping, and we also described briefly a relatively new related subject, the magneto-rotation coupling, a coupling of the rotation of the lattice with magnetic anisotropies. In memory of Prof. Charles Kittel who passed away the last May 2019 at the age of 102 years old. Read more Acoustic ferromagnetic resonance and spin pumping induced by surface acoustic waves J. Puebla, M. Xu, B. Rana, K. Yamamoto, S. Maekawa and Y. Otani Journal of Physics D: Applied Physics, Vol. 53, No. 26 (2020) https://iopscience.iop.org/article/10.1088/1361-6463/ab7efe arXiv: https://arxiv.org/abs/2001.09581
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Jorge PueblaResearch Scientist Archives
October 2020
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