Low damping (111) oriented lithium aluminum ferrite thin films for spin wave applications
Abstract
Spin wave-based spintronics are an alternative to conventional electronics due to their potential for efficient energy consumption, improved processing speed, and smaller device dimensions. Low damping magnetic insulators provide the medium for efficient propagation of spin waves for information transfer. We have synthesized by pulsed laser deposition epitaxial spinel structure ferrite thin films of Li0.5(Al1.0Fe1.5)O4 (LAFO) on (111)-oriented MgAl2O4 that support isotropic magnon propagation in the film plane. Our ferromagnetic resonance measurements show low magnetic damping with a typical Gilbert damping parameter of α=0.006 and weak-spin–orbit coupling with g = 2.02. These films have low effective magnetization, μo Meff = 20 mT, similar to that of yttrium iron garnet, the gold standard of low loss magnetic insulators. Our findings show that LAFO is a good candidate as a spin wave medium since it can be grown at low temperatures in different crystal orientations.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (12)
Lerato Takana
Department of Applied Physics, Stanford University 1 , Stanford, California 94305,
Sanyum Channa
Geballe Laboratory for Advanced Materials, Stanford University 2 , Stanford, California 94305,
Xin Yu Zheng
Department of Applied Physics, Stanford University 1 , Stanford, California 94305,
Daisy O'Mahoney
Geballe Laboratory for Advanced Materials, Stanford University 2 , Stanford, California 94305,
Sauviz Alaei
Geballe Laboratory for Advanced Materials, Stanford University 2 , Stanford, California 94305,
Yuntian Li
Geballe Laboratory for Advanced Materials and Department of Applied Physics
Arturas Vailionis
Stanford Nano Shared Facilities, Stanford University 5 , Stanford, California 94305,
Padraic Shafer
Advanced Light Source, Lawrence Berkeley National Laboratory 7 , Berkeley, California 94720,
Alpha T. N'Diaye
Advanced Light Source, Lawrence Berkeley National Laboratory 7 , Berkeley, California 94720,
Christoph Klewe
Materials Sciences Division, Lawrence Berkeley National Laboratory
Ian Fisher
Department of Applied Physics, Stanford University 1 , Stanford, California 94305,
Yuri Suzuki