Nonreciprocal spin waves in Co-Ta-Zr films and multilayers

Pedram Khalili Amiri; Behzad Rejaei; Yan Zhuang; Marina Vroubel; Dok Won Lee; Shan X. Wang

doi:10.1109/TMAG.2009.2022491

Nonreciprocal spin waves in Co-Ta-Zr films and multilayers

Pedram Khalili Amiri, Behzad Rejaei, Yan Zhuang, Marina Vroubel, Dok Won Lee, Shan X. Wang

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The propagation of spin waves in single and multilayered ferromagnetic Co-Ta-Zr films is experimentally investigated in this work. Two microstrip antennas placed on top of the magnetic core are used for signal transmission and reception. A metallic ground layer placed on one side of the magnetic film leads to nonreciprocal spin wave dispersion, resulting in a direction-dependent coupling of the antennas. Compared to previous experiments with Ni-Fe films, the higher resistivity of the Co-Ta-Zr reduces the energy dissipation in the device and allows for the incorporation of a thicker magnetic film, thereby increasing the nonreciprocity and the spin wave propagation frequency range. In the case of the Co-Ta-Zr/SiO₂ multilayer, the spin wave-mediated coupling of the antennas is strongly dependent on the relative orientation of the magnetizations in the individual layers, and on the application of an external magnetic field.

Original language	English (US)
Article number	5257122
Pages (from-to)	4215-4218
Number of pages	4
Journal	Ieee Transactions on Magnetics
Volume	45
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2009.2022491
State	Published - Oct 2009

Funding

The authors would like to thank the staff of the Delft Institute of Microsystems and Nanoelectronics (DIMES), in particular H. Schellevis and A. Akhnoukh, as well as Prof. J. N. Burghartz of the Institute for Microelectronics Stuttgart (IMS CHIPS) and Prof. K. L. Wang of UCLA, for their support. This work was supported by the technology foundation STW of the Netherlands, and by the Nanoelectronics Research Initiative (NRI) through the Western Institute of Nanoelectronics (WIN).

Keywords

Magnetic microwave devices
Magnetic multilayers
Nonreciprocal devices
Soft magnetic films
Spin waves

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2009.2022491

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title = "Nonreciprocal spin waves in Co-Ta-Zr films and multilayers",

abstract = "The propagation of spin waves in single and multilayered ferromagnetic Co-Ta-Zr films is experimentally investigated in this work. Two microstrip antennas placed on top of the magnetic core are used for signal transmission and reception. A metallic ground layer placed on one side of the magnetic film leads to nonreciprocal spin wave dispersion, resulting in a direction-dependent coupling of the antennas. Compared to previous experiments with Ni-Fe films, the higher resistivity of the Co-Ta-Zr reduces the energy dissipation in the device and allows for the incorporation of a thicker magnetic film, thereby increasing the nonreciprocity and the spin wave propagation frequency range. In the case of the Co-Ta-Zr/SiO2 multilayer, the spin wave-mediated coupling of the antennas is strongly dependent on the relative orientation of the magnetizations in the individual layers, and on the application of an external magnetic field.",

keywords = "Magnetic microwave devices, Magnetic multilayers, Nonreciprocal devices, Soft magnetic films, Spin waves",

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note = "Funding Information: The authors would like to thank the staff of the Delft Institute of Microsystems and Nanoelectronics (DIMES), in particular H. Schellevis and A. Akhnoukh, as well as Prof. J. N. Burghartz of the Institute for Microelectronics Stuttgart (IMS CHIPS) and Prof. K. L. Wang of UCLA, for their support. This work was supported by the technology foundation STW of the Netherlands, and by the Nanoelectronics Research Initiative (NRI) through the Western Institute of Nanoelectronics (WIN).",

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AU - Rejaei, Behzad

AU - Zhuang, Yan

AU - Vroubel, Marina

AU - Lee, Dok Won

AU - Wang, Shan X.

N1 - Funding Information: The authors would like to thank the staff of the Delft Institute of Microsystems and Nanoelectronics (DIMES), in particular H. Schellevis and A. Akhnoukh, as well as Prof. J. N. Burghartz of the Institute for Microelectronics Stuttgart (IMS CHIPS) and Prof. K. L. Wang of UCLA, for their support. This work was supported by the technology foundation STW of the Netherlands, and by the Nanoelectronics Research Initiative (NRI) through the Western Institute of Nanoelectronics (WIN).

PY - 2009/10

Y1 - 2009/10

N2 - The propagation of spin waves in single and multilayered ferromagnetic Co-Ta-Zr films is experimentally investigated in this work. Two microstrip antennas placed on top of the magnetic core are used for signal transmission and reception. A metallic ground layer placed on one side of the magnetic film leads to nonreciprocal spin wave dispersion, resulting in a direction-dependent coupling of the antennas. Compared to previous experiments with Ni-Fe films, the higher resistivity of the Co-Ta-Zr reduces the energy dissipation in the device and allows for the incorporation of a thicker magnetic film, thereby increasing the nonreciprocity and the spin wave propagation frequency range. In the case of the Co-Ta-Zr/SiO2 multilayer, the spin wave-mediated coupling of the antennas is strongly dependent on the relative orientation of the magnetizations in the individual layers, and on the application of an external magnetic field.

AB - The propagation of spin waves in single and multilayered ferromagnetic Co-Ta-Zr films is experimentally investigated in this work. Two microstrip antennas placed on top of the magnetic core are used for signal transmission and reception. A metallic ground layer placed on one side of the magnetic film leads to nonreciprocal spin wave dispersion, resulting in a direction-dependent coupling of the antennas. Compared to previous experiments with Ni-Fe films, the higher resistivity of the Co-Ta-Zr reduces the energy dissipation in the device and allows for the incorporation of a thicker magnetic film, thereby increasing the nonreciprocity and the spin wave propagation frequency range. In the case of the Co-Ta-Zr/SiO2 multilayer, the spin wave-mediated coupling of the antennas is strongly dependent on the relative orientation of the magnetizations in the individual layers, and on the application of an external magnetic field.

KW - Magnetic microwave devices

KW - Magnetic multilayers

KW - Nonreciprocal devices

KW - Soft magnetic films

KW - Spin waves

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Nonreciprocal spin waves in Co-Ta-Zr films and multilayers

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