Biquadratic exchange coupling in an unequal Fe/Cr/Fe(1 0 0) trilayer |
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| Institution: | 1. Materials Science Division 223, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439, USA;2. IBM, Almaden Research Center, San Jose, CA 95120-6099, USA;1. Institute for Integrative Nanosciences, Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, Dresden 01069, Germany;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;3. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Yudao Street 29, Nanjing 210016, China;4. Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, Dresden 01069, Germany;1. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia;2. Research Center for Quantum Physics, National Research and Innovation Agency (BRIN), South Tangerang, 15214, Indonesia;3. Laboratoire de Matière Condensée et Sciences Interdisciplinaires (LaMCScI), Faculty of Sciences, P.O.Box 1014, Mohammed V University in Rabat, Morocco;1. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;2. Institute of Microelectronics and Optoelectronics, College of Information Science and Electronic Engineering, Zhejiang University, 310027, PR China;1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;2. Assset and Equipment Management Department, Huizhou University, Huizhou 516007, China;1. Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, The Netherlands;2. Center for Memory and Recording Research, University of California San Diego, La Jolla, CA 92093, United States;3. Department of Physics, School of Sciences, National Institute of Technology, Andhra Pradesh 534102, India |
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| Abstract: | We have investigated the magnetic properties of a (1 0 0)-oriented unequal trilayer, Fe(45 Å)/Cr(30 Å)/Fe(15 Å), by means of Brillouin light scattering and magnetization measurements. The experimental results show that this sample highlights the effect of biquadratic coupling which aligns the magnetization of the Fe layers at 90° to each other. We extracted the bilinear and biquadratic coupling strengths by fitting the experimental results with a theory that treats the static and dynamic responses on an equal footing. Our results confirm that the model describes both the static and dynamic properties even when the magnetization of the layers is aligned at 90°. The coupling strengths, and their temperature dependence, are discussed and compared with other results reported in the literature. |
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