Mutual phase-locking of microwave spin torque nano-oscillators.
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| Title: | Mutual phase-locking of microwave spin torque nano-oscillators. |
|---|---|
| Authors: | Kaka, Shehzaad, Pufall, Matthew R., Rippard, William H., Silva, Thomas J., Russek, Stephen E., Katine, Jordan A. |
| Source: | Nature. 9/15/2005, Vol. 437 Issue 7057, p389-392. 4p. |
| Subjects: | Electric oscillators, Electric equipment, Microwaves, Electric waves, Electromagnetic waves |
| Abstract: | The spin torque effect that occurs in nanometre-scale magnetic multilayer devices can be used to generate steady-state microwave signals in response to a d.c. electrical current. This establishes a new functionality for magneto-electronic structures that are more commonly used as magnetic field sensors and magnetic memory elements. The microwave power emitted from a single spin torque nano-oscillator (STNO) is at present typically less than 1 nW. To achieve a more useful power level (on the order of microwatts), a device could consist of an array of phase coherent STNOs, in a manner analogous to arrays of Josephson junctions and larger semiconductor oscillators. Here we show that two STNOs in close proximity mutually phase-lock—that is, they synchronize, which is a general tendency of interacting nonlinear oscillator systems. The phase-locked state is distinct, characterized by a sudden narrowing of signal linewidth and an increase in power due to the coherence of the individual oscillators. Arrays of phase-locked STNOs could be used as nanometre-scale reference oscillators. Furthermore, phase control of array elements (phased array) could lead to nanometre-scale directional transmitters and receivers for wireless communications. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 18301425 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mutual phase-locking of microwave spin torque nano-oscillators. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kaka%2C+Shehzaad%22">Kaka, Shehzaad</searchLink><br /><searchLink fieldCode="AR" term="%22Pufall%2C+Matthew+R%2E%22">Pufall, Matthew R.</searchLink><br /><searchLink fieldCode="AR" term="%22Rippard%2C+William+H%2E%22">Rippard, William H.</searchLink><br /><searchLink fieldCode="AR" term="%22Silva%2C+Thomas+J%2E%22">Silva, Thomas J.</searchLink><br /><searchLink fieldCode="AR" term="%22Russek%2C+Stephen+E%2E%22">Russek, Stephen E.</searchLink><br /><searchLink fieldCode="AR" term="%22Katine%2C+Jordan+A%2E%22">Katine, Jordan A.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 9/15/2005, Vol. 437 Issue 7057, p389-392. 4p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electric+oscillators%22">Electric oscillators</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+equipment%22">Electric equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Microwaves%22">Microwaves</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+waves%22">Electric waves</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+waves%22">Electromagnetic waves</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The spin torque effect that occurs in nanometre-scale magnetic multilayer devices can be used to generate steady-state microwave signals in response to a d.c. electrical current. This establishes a new functionality for magneto-electronic structures that are more commonly used as magnetic field sensors and magnetic memory elements. The microwave power emitted from a single spin torque nano-oscillator (STNO) is at present typically less than 1 nW. To achieve a more useful power level (on the order of microwatts), a device could consist of an array of phase coherent STNOs, in a manner analogous to arrays of Josephson junctions and larger semiconductor oscillators. Here we show that two STNOs in close proximity mutually phase-lock—that is, they synchronize, which is a general tendency of interacting nonlinear oscillator systems. The phase-locked state is distinct, characterized by a sudden narrowing of signal linewidth and an increase in power due to the coherence of the individual oscillators. Arrays of phase-locked STNOs could be used as nanometre-scale reference oscillators. Furthermore, phase control of array elements (phased array) could lead to nanometre-scale directional transmitters and receivers for wireless communications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature04035 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 389 Subjects: – SubjectFull: Electric oscillators Type: general – SubjectFull: Electric equipment Type: general – SubjectFull: Microwaves Type: general – SubjectFull: Electric waves Type: general – SubjectFull: Electromagnetic waves Type: general Titles: – TitleFull: Mutual phase-locking of microwave spin torque nano-oscillators. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kaka, Shehzaad – PersonEntity: Name: NameFull: Pufall, Matthew R. – PersonEntity: Name: NameFull: Rippard, William H. – PersonEntity: Name: NameFull: Silva, Thomas J. – PersonEntity: Name: NameFull: Russek, Stephen E. – PersonEntity: Name: NameFull: Katine, Jordan A. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 09 Text: 9/15/2005 Type: published Y: 2005 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 437 – Type: issue Value: 7057 Titles: – TitleFull: Nature Type: main |
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