Characterization of magnetoresistance hysteresis of Permalloy thin-film using near-field microwave microscope

Harutyun Melikyan; Arsen Babajanyan; Neun Jong Lee; Tae Hee Kim; Hanju Lee; Kiejin Lee; Barry Friedman

doi:10.1016/j.tsf.2010.07.024

Characterization of magnetoresistance hysteresis of Permalloy thin-film using near-field microwave microscope

Harutyun Melikyan, Arsen Babajanyan, Neun Jong Lee, Tae Hee Kim, Hanju Lee, Kiejin Lee, Barry Friedman

Department of Physics

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

1 Scopus citations

Abstract

A near-field scanning microwave microprobe (NSMM) technique has been used to investigate the magnetic properties of the Permalloy (Ni₈₁Fe ₁₉) thin film. To characterize the hysteresis behavior of the magnetoresistance (MR) of Permalloy (Py) thin films, the microwave reflection coefficient, S₁₁ was measured. The change of the estimated MR was observed under in-plane external magnetic fields, and was confirmed with variation of MR measured by the 4-probe method. The magnetic properties of the Py thin film were examined by a vibrating sample magnetometer. The observed MR was correlated with the changes of the relative magnetic permeability, Δμ of the Py. We also directly imaged the Py thin film changes by NSMM. MR of Py was determined from the visualized microwave reflection coefficient changes ΔS₁₁ at the thin film interface with high sensitivity. The present methodology can be extended to investigations of other magnetic thin films or magnetic materials using the NSMM system.

Original language	English
Pages (from-to)	399-403
Number of pages	5
Journal	Thin Solid Films
Volume	519
Issue number	1
DOIs	https://doi.org/10.1016/j.tsf.2010.07.024
State	Published - 29 Oct 2010

Bibliographical note

Funding Information:
This work was supported by Sogang University Special Research Grant ( 2008 ), Seoul Research and Business Development Program ( 10816 ), Korea Research Foundation Grant ( KRF-2008-615-C00001 ), Basic Science Research Program through the National Research Foundation of Korea Grant ( 2010-0012037 ), and Priority Research Centers Program through the National Research Foundation of Korea ( 2009-0093822 ).

Keywords

4-probe method
Magnetoresistance
Near-Field Microwave Microscope
Permalloy
Permeability

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10.1016/j.tsf.2010.07.024

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title = "Characterization of magnetoresistance hysteresis of Permalloy thin-film using near-field microwave microscope",

abstract = "A near-field scanning microwave microprobe (NSMM) technique has been used to investigate the magnetic properties of the Permalloy (Ni81Fe 19) thin film. To characterize the hysteresis behavior of the magnetoresistance (MR) of Permalloy (Py) thin films, the microwave reflection coefficient, S11 was measured. The change of the estimated MR was observed under in-plane external magnetic fields, and was confirmed with variation of MR measured by the 4-probe method. The magnetic properties of the Py thin film were examined by a vibrating sample magnetometer. The observed MR was correlated with the changes of the relative magnetic permeability, Δμ of the Py. We also directly imaged the Py thin film changes by NSMM. MR of Py was determined from the visualized microwave reflection coefficient changes ΔS11 at the thin film interface with high sensitivity. The present methodology can be extended to investigations of other magnetic thin films or magnetic materials using the NSMM system.",

keywords = "4-probe method, Magnetoresistance, Near-Field Microwave Microscope, Permalloy, Permeability",

author = "Harutyun Melikyan and Arsen Babajanyan and Lee, {Neun Jong} and Kim, {Tae Hee} and Hanju Lee and Kiejin Lee and Barry Friedman",

note = "Funding Information: This work was supported by Sogang University Special Research Grant ( 2008 ), Seoul Research and Business Development Program ( 10816 ), Korea Research Foundation Grant ( KRF-2008-615-C00001 ), Basic Science Research Program through the National Research Foundation of Korea Grant ( 2010-0012037 ), and Priority Research Centers Program through the National Research Foundation of Korea ( 2009-0093822 ).",

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doi = "10.1016/j.tsf.2010.07.024",

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AU - Babajanyan, Arsen

AU - Lee, Neun Jong

AU - Kim, Tae Hee

AU - Lee, Hanju

AU - Lee, Kiejin

AU - Friedman, Barry

N1 - Funding Information: This work was supported by Sogang University Special Research Grant ( 2008 ), Seoul Research and Business Development Program ( 10816 ), Korea Research Foundation Grant ( KRF-2008-615-C00001 ), Basic Science Research Program through the National Research Foundation of Korea Grant ( 2010-0012037 ), and Priority Research Centers Program through the National Research Foundation of Korea ( 2009-0093822 ).

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Y1 - 2010/10/29

N2 - A near-field scanning microwave microprobe (NSMM) technique has been used to investigate the magnetic properties of the Permalloy (Ni81Fe 19) thin film. To characterize the hysteresis behavior of the magnetoresistance (MR) of Permalloy (Py) thin films, the microwave reflection coefficient, S11 was measured. The change of the estimated MR was observed under in-plane external magnetic fields, and was confirmed with variation of MR measured by the 4-probe method. The magnetic properties of the Py thin film were examined by a vibrating sample magnetometer. The observed MR was correlated with the changes of the relative magnetic permeability, Δμ of the Py. We also directly imaged the Py thin film changes by NSMM. MR of Py was determined from the visualized microwave reflection coefficient changes ΔS11 at the thin film interface with high sensitivity. The present methodology can be extended to investigations of other magnetic thin films or magnetic materials using the NSMM system.

AB - A near-field scanning microwave microprobe (NSMM) technique has been used to investigate the magnetic properties of the Permalloy (Ni81Fe 19) thin film. To characterize the hysteresis behavior of the magnetoresistance (MR) of Permalloy (Py) thin films, the microwave reflection coefficient, S11 was measured. The change of the estimated MR was observed under in-plane external magnetic fields, and was confirmed with variation of MR measured by the 4-probe method. The magnetic properties of the Py thin film were examined by a vibrating sample magnetometer. The observed MR was correlated with the changes of the relative magnetic permeability, Δμ of the Py. We also directly imaged the Py thin film changes by NSMM. MR of Py was determined from the visualized microwave reflection coefficient changes ΔS11 at the thin film interface with high sensitivity. The present methodology can be extended to investigations of other magnetic thin films or magnetic materials using the NSMM system.

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KW - Near-Field Microwave Microscope

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KW - Permeability

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Characterization of magnetoresistance hysteresis of Permalloy thin-film using near-field microwave microscope

Abstract

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Keywords

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