Characterization of MgO-Based Magnetic Tunnel Junctions' Nonlinear Ferromagnetic Resonance Modes
We propose a new measurement technique to characterize ferromagnetic resonance (FMR) modes in magnetic tunnel junctions. Due to the selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR m...
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| Veröffentlicht in: | IEEE transactions on magnetics 2018-02, Vol.54 (2), p.1-5 |
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| container_title | IEEE transactions on magnetics |
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| creator | Auerbach, Ekaterina Leder, Norbert Gider, Savas Arthaber, Holger |
| description | We propose a new measurement technique to characterize ferromagnetic resonance (FMR) modes in magnetic tunnel junctions. Due to the selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR measurements. Instead of relying on weak coupling between the ac excitation and the magnetization fluctuations, we measure the noise floor difference between the two states: at zero and non-zero dc bias. The difference is due to the ferromagnetic layers' magnetization fluctuations adding to the noise floor of the ac excitation signal. This readout mechanism differentiates the proposed method from the previously reported measurement systems. Moreover, by separately adding a controllable RF source, we detect both the linear and nonlinear FMR modes. |
| doi_str_mv | 10.1109/TMAG.2017.2744659 |
| format | Article |
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Due to the selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR measurements. Instead of relying on weak coupling between the ac excitation and the magnetization fluctuations, we measure the noise floor difference between the two states: at zero and non-zero dc bias. The difference is due to the ferromagnetic layers' magnetization fluctuations adding to the noise floor of the ac excitation signal. This readout mechanism differentiates the proposed method from the previously reported measurement systems. Moreover, by separately adding a controllable RF source, we detect both the linear and nonlinear FMR modes.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2017.2744659</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Analyzers ; Couplings ; Excitation ; Ferromagnetic resonance ; Ferromagnetic resonance (FMR) ; Ferromagnetism ; Floors ; Frequency measurement ; magnetic noise ; Magnetic resonance ; magnetic tunnel junction (MTJ) ; Magnetic tunneling ; Magnetism ; Magnetization ; Measurement techniques ; Noise ; Noise measurement ; Power measurement ; Radio frequency ; Rangefinding ; Selectivity ; signal-to-noise ratio (SNR) ; Tunnel junctions ; Variation</subject><ispartof>IEEE transactions on magnetics, 2018-02, Vol.54 (2), p.1-5</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2018</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-dba72eda85529c2f70c7d2a72f62b988778a16dc1295adda4b6865f04c6fb9753</citedby><cites>FETCH-LOGICAL-c293t-dba72eda85529c2f70c7d2a72f62b988778a16dc1295adda4b6865f04c6fb9753</cites><orcidid>0000-0003-1521-7766</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8016686$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8016686$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Auerbach, Ekaterina</creatorcontrib><creatorcontrib>Leder, Norbert</creatorcontrib><creatorcontrib>Gider, Savas</creatorcontrib><creatorcontrib>Arthaber, Holger</creatorcontrib><title>Characterization of MgO-Based Magnetic Tunnel Junctions' Nonlinear Ferromagnetic Resonance Modes</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>We propose a new measurement technique to characterize ferromagnetic resonance (FMR) modes in magnetic tunnel junctions. Due to the selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR measurements. Instead of relying on weak coupling between the ac excitation and the magnetization fluctuations, we measure the noise floor difference between the two states: at zero and non-zero dc bias. The difference is due to the ferromagnetic layers' magnetization fluctuations adding to the noise floor of the ac excitation signal. This readout mechanism differentiates the proposed method from the previously reported measurement systems. Moreover, by separately adding a controllable RF source, we detect both the linear and nonlinear FMR modes.</description><subject>Analyzers</subject><subject>Couplings</subject><subject>Excitation</subject><subject>Ferromagnetic resonance</subject><subject>Ferromagnetic resonance (FMR)</subject><subject>Ferromagnetism</subject><subject>Floors</subject><subject>Frequency measurement</subject><subject>magnetic noise</subject><subject>Magnetic resonance</subject><subject>magnetic tunnel junction (MTJ)</subject><subject>Magnetic tunneling</subject><subject>Magnetism</subject><subject>Magnetization</subject><subject>Measurement techniques</subject><subject>Noise</subject><subject>Noise measurement</subject><subject>Power measurement</subject><subject>Radio frequency</subject><subject>Rangefinding</subject><subject>Selectivity</subject><subject>signal-to-noise ratio (SNR)</subject><subject>Tunnel junctions</subject><subject>Variation</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kMFOwzAMhiMEEmPwAIhLJQ6cOpIsTZrjmNgArUxC4xzSxB2dtmQk7QGenlYbnCxb329bH0LXBI8IwfJ-VUzmI4qJGFHBGM_kCRoQyUiKMZenaIAxyVPJODtHFzFuupZlBA_Qx_RTB20aCPWPbmrvEl8lxXqZPugINin02kFTm2TVOgfb5KV1pqfiXfLq3bZ2oEMygxD87o98g-iddgaSwluIl-is0tsIV8c6RO-zx9X0KV0s58_TySI1VI6b1JZaULA6zzIqDa0ENsLSblZxWso8FyLXhFtDqMy0tZqVPOdZhZnhVSlFNh6i28PeffBfLcRGbXwbXHdSUdIpEZwT2VHkQJngYwxQqX2odzp8K4JVL1L1IlUvUh1FdpmbQ6YGgH8-x4R3L4x_ASDZb3o</recordid><startdate>20180201</startdate><enddate>20180201</enddate><creator>Auerbach, Ekaterina</creator><creator>Leder, Norbert</creator><creator>Gider, Savas</creator><creator>Arthaber, Holger</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Due to the selectivity and low-noise characteristics of the utilized radio-frequency (RF) receiver, which is often used in spectrum analyzers, we achieve large dynamic range FMR measurements. Instead of relying on weak coupling between the ac excitation and the magnetization fluctuations, we measure the noise floor difference between the two states: at zero and non-zero dc bias. The difference is due to the ferromagnetic layers' magnetization fluctuations adding to the noise floor of the ac excitation signal. This readout mechanism differentiates the proposed method from the previously reported measurement systems. Moreover, by separately adding a controllable RF source, we detect both the linear and nonlinear FMR modes.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TMAG.2017.2744659</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0003-1521-7766</orcidid></addata></record> |
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| subjects | Analyzers Couplings Excitation Ferromagnetic resonance Ferromagnetic resonance (FMR) Ferromagnetism Floors Frequency measurement magnetic noise Magnetic resonance magnetic tunnel junction (MTJ) Magnetic tunneling Magnetism Magnetization Measurement techniques Noise Noise measurement Power measurement Radio frequency Rangefinding Selectivity signal-to-noise ratio (SNR) Tunnel junctions Variation |
| title | Characterization of MgO-Based Magnetic Tunnel Junctions' Nonlinear Ferromagnetic Resonance Modes |
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