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Conference Paper: Preliminary design and noise considerations for an ultrasensitive magnetic field sensor

TitlePreliminary design and noise considerations for an ultrasensitive magnetic field sensor
Authors
Keywords1/F Noise
Design Tool
Johnson Noise
Mag Noise
Magnetic Field Sensor
Magnetic Tunnel Junction
Tunneling Magnetoresistance
Issue Date2007
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
Proceedings Of Spie - The International Society For Optical Engineering, 2007, v. 6645 How to Cite?
AbstractIn this paper, we discuss the structural design including the materials, junction areas, and magnetic layers thicknesses, and various noise sources including Johnson noise, shot noise, 1/f noise, and thermal magnetic noise, that must be considered when building a magnetic tunnel junction (MTJ) magnetic field sensor with the goal of SQUID-like sensitivity. Analytical derivations of the sensor sensitivity and different noise sources are provided. A highly-portable software design tool is developed to optimize the various parameters of the sensor design, while also predicting the expected sensitivity, operating frequency range, operating current and power of the finished sensor. The functions and operations of this design tool are described. The relationships between the sensor detectivity and some critical design parameters are studied with this design tool. A possible design for the construction of an ultrasensitive magnetic field sensor is proposed.
Persistent Identifierhttp://hdl.handle.net/10722/158498
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorPong, PWTen_US
dc.contributor.authorMcmichael, Ren_US
dc.contributor.authorEdelstein, ASen_US
dc.contributor.authorNowak, ERen_US
dc.contributor.authorEgelhoff Jr, WFen_US
dc.date.accessioned2012-08-08T08:59:56Z-
dc.date.available2012-08-08T08:59:56Z-
dc.date.issued2007en_US
dc.identifier.citationProceedings Of Spie - The International Society For Optical Engineering, 2007, v. 6645en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/158498-
dc.description.abstractIn this paper, we discuss the structural design including the materials, junction areas, and magnetic layers thicknesses, and various noise sources including Johnson noise, shot noise, 1/f noise, and thermal magnetic noise, that must be considered when building a magnetic tunnel junction (MTJ) magnetic field sensor with the goal of SQUID-like sensitivity. Analytical derivations of the sensor sensitivity and different noise sources are provided. A highly-portable software design tool is developed to optimize the various parameters of the sensor design, while also predicting the expected sensitivity, operating frequency range, operating current and power of the finished sensor. The functions and operations of this design tool are described. The relationships between the sensor detectivity and some critical design parameters are studied with this design tool. A possible design for the construction of an ultrasensitive magnetic field sensor is proposed.en_US
dc.languageengen_US
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_US
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.subject1/F Noiseen_US
dc.subjectDesign Toolen_US
dc.subjectJohnson Noiseen_US
dc.subjectMag Noiseen_US
dc.subjectMagnetic Field Sensoren_US
dc.subjectMagnetic Tunnel Junctionen_US
dc.subjectTunneling Magnetoresistanceen_US
dc.titlePreliminary design and noise considerations for an ultrasensitive magnetic field sensoren_US
dc.typeConference_Paperen_US
dc.identifier.emailPong, PWT:ppong@eee.hku.hken_US
dc.identifier.authorityPong, PWT=rp00217en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1117/12.731142en_US
dc.identifier.scopuseid_2-s2.0-42149125744en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-42149125744&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume6645en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridPong, PWT=24071267900en_US
dc.identifier.scopusauthoridMcMichael, R=7007083420en_US
dc.identifier.scopusauthoridEdelstein, AS=24425632300en_US
dc.identifier.scopusauthoridNowak, ER=7103283674en_US
dc.identifier.scopusauthoridEgelhoff Jr, WF=7006151986en_US

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