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Title: Magnonic holographic imaging of magnetic microstructures

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1388946
DOE Contract Number:
SC0012670
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Magnetism and Magnetic Materials; Journal Volume: 428; Journal Issue: C; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin
Country of Publication:
United States
Language:
English
Subject:
phonons, thermal conductivity, thermoelectric, spin dynamics, spintronics

Citation Formats

Gutierrez, D., Chiang, H., Bhowmick, T., Volodchenkov, A. D., Ranjbar, M., Liu, G., Jiang, C., Warren, C., Khivintsev, Y., Filimonov, Y., Garay, J., Lake, R., Balandin, A. A., and Khitun, A.. Magnonic holographic imaging of magnetic microstructures. United States: N. p., 2017. Web. doi:10.1016/j.jmmm.2016.12.022.
Gutierrez, D., Chiang, H., Bhowmick, T., Volodchenkov, A. D., Ranjbar, M., Liu, G., Jiang, C., Warren, C., Khivintsev, Y., Filimonov, Y., Garay, J., Lake, R., Balandin, A. A., & Khitun, A.. Magnonic holographic imaging of magnetic microstructures. United States. doi:10.1016/j.jmmm.2016.12.022.
Gutierrez, D., Chiang, H., Bhowmick, T., Volodchenkov, A. D., Ranjbar, M., Liu, G., Jiang, C., Warren, C., Khivintsev, Y., Filimonov, Y., Garay, J., Lake, R., Balandin, A. A., and Khitun, A.. Sat . "Magnonic holographic imaging of magnetic microstructures". United States. doi:10.1016/j.jmmm.2016.12.022.
@article{osti_1388946,
title = {Magnonic holographic imaging of magnetic microstructures},
author = {Gutierrez, D. and Chiang, H. and Bhowmick, T. and Volodchenkov, A. D. and Ranjbar, M. and Liu, G. and Jiang, C. and Warren, C. and Khivintsev, Y. and Filimonov, Y. and Garay, J. and Lake, R. and Balandin, A. A. and Khitun, A.},
abstractNote = {},
doi = {10.1016/j.jmmm.2016.12.022},
journal = {Journal of Magnetism and Magnetic Materials},
number = C,
volume = 428,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}
  • In this work, we present experimental data demonstrating the possibility of using magnonic holographic devices for pattern recognition. The prototype eight-terminal device consists of a magnetic matrix with micro-antennas placed on the periphery of the matrix to excite and detect spin waves. The principle of operation is based on the effect of spin wave interference, which is similar to the operation of optical holographic devices. Input information is encoded in the phases of the spin waves generated on the edges of the magnonic matrix, while the output corresponds to the amplitude of the inductive voltage produced by the interfering spinmore » waves on the other side of the matrix. The level of the output voltage depends on the combination of the input phases as well as on the internal structure of the magnonic matrix. Experimental data collected for several magnonic matrixes show the unique output signatures in which maxima and minima correspond to specific input phase patterns. Potentially, magnonic holographic devices may provide a higher storage density compare to optical counterparts due to a shorter wavelength and compatibility with conventional electronic devices. The challenges and shortcoming of the magnonic holographic devices are also discussed.« less
  • In this work, we describe the capabilities of Magnonic Holographic Memory (MHM) for parallel database search and prime factorization. MHM is a type of holographic device, which utilizes spin waves for data transfer and processing. Its operation is based on the correlation between the phases and the amplitudes of the input spin waves and the output inductive voltage. The input of MHM is provided by the phased array of spin wave generating elements allowing the producing of phase patterns of an arbitrary form. The latter makes it possible to code logic states into the phases of propagating waves and exploitmore » wave superposition for parallel data processing. We present the results of numerical modeling illustrating parallel database search and prime factorization. The results of numerical simulations on the database search are in agreement with the available experimental data. The use of classical wave interference may results in a significant speedup over the conventional digital logic circuits in special task data processing (e.g., √n in database search). Potentially, magnonic holographic devices can be implemented as complementary logic units to digital processors. Physical limitations and technological constrains of the spin wave approach are also discussed.« less
  • Theoretical studies, based on three independent techniques, of the band structure of a one-dimensional width-modulated magnonic crystal under a transverse magnetic field are reported. The band diagram is found to display distinct behaviors when the transverse field is either larger or smaller than a critical value. The widths and center positions of bandgaps exhibit unusual non-monotonic and large field-tunability through tilting the direction of magnetization. Some bandgaps can be dynamically switched on and off by simply tuning the strength of such a static field. Finally, the impact of the lowered symmetry of the magnetic ground state on the spin-wave excitationmore » efficiency of an oscillating magnetic field is discussed. Our finding reveals that the magnetization direction plays an important role in tailoring magnonic band structures and hence in the design of dynamic spin-wave switches.« less