Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers

Marcos Antonio De Sousa; Fernando Pelegrini; Willian Alayo; Justiniano Quispe-Marcatoma; Elisa Baggio-Saitovitch

doi:10.1016/j.physb.2014.05.050

Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers

Marcos Antonio De Sousa, Fernando Pelegrini, Willian Alayo, Justiniano Quispe-Marcatoma, Elisa Baggio-Saitovitch

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

15 Scopus citations

Abstract

Ferromagnetic Resonance study of sputtered Ru(7 nm)/NiFe(t _FM)/IrMn(6 nm)/Ru(5 nm) exchange-biased bilayers at X and Q-band microwave frequencies reveals the excitation of spin-wave and NiFe resonance modes. Angular variations of the in-plane resonance fields of spin-wave and NiFe resonance modes show the effect of the unidirectional anisotropy, which is about twice larger for the spin-wave mode due to spin pinning at the NiFe/IrMn interface. At Q-band frequency the angular variations of in-plane resonance fields also reveal the symmetry of a uniaxial anisotropy. A modified theoretical model which also includes the contribution of a rotatable anisotropy provides a good description of the experimental results.

Original language	English
Pages (from-to)	167-172
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	450
DOIs	https://doi.org/10.1016/j.physb.2014.05.050
State	Published - 1 Oct 2014

Bibliographical note

Funding Information:
This work was partially supported by the Brazilian agencies CNPq (throughout the Projects 141830/2009-3 and 151440/2013-1 ), FAPERJ and CAPES.

Keywords

Anisotropy
Exchange bias
Ferromagnetic resonance
Magnetic bilayers
Spin pinning
Spin wave resonance

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10.1016/j.physb.2014.05.050

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title = "Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers",

abstract = "Ferromagnetic Resonance study of sputtered Ru(7 nm)/NiFe(t FM)/IrMn(6 nm)/Ru(5 nm) exchange-biased bilayers at X and Q-band microwave frequencies reveals the excitation of spin-wave and NiFe resonance modes. Angular variations of the in-plane resonance fields of spin-wave and NiFe resonance modes show the effect of the unidirectional anisotropy, which is about twice larger for the spin-wave mode due to spin pinning at the NiFe/IrMn interface. At Q-band frequency the angular variations of in-plane resonance fields also reveal the symmetry of a uniaxial anisotropy. A modified theoretical model which also includes the contribution of a rotatable anisotropy provides a good description of the experimental results.",

keywords = "Anisotropy, Exchange bias, Ferromagnetic resonance, Magnetic bilayers, Spin pinning, Spin wave resonance",

author = "{De Sousa}, {Marcos Antonio} and Fernando Pelegrini and Willian Alayo and Justiniano Quispe-Marcatoma and Elisa Baggio-Saitovitch",

note = "Funding Information: This work was partially supported by the Brazilian agencies CNPq (throughout the Projects 141830/2009-3 and 151440/2013-1 ), FAPERJ and CAPES.",

year = "2014",

month = oct,

day = "1",

doi = "10.1016/j.physb.2014.05.050",

language = "Ingl{\'e}s",

volume = "450",

pages = "167--172",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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TY - JOUR

T1 - Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers

AU - De Sousa, Marcos Antonio

AU - Pelegrini, Fernando

AU - Alayo, Willian

AU - Quispe-Marcatoma, Justiniano

AU - Baggio-Saitovitch, Elisa

N1 - Funding Information: This work was partially supported by the Brazilian agencies CNPq (throughout the Projects 141830/2009-3 and 151440/2013-1 ), FAPERJ and CAPES.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Ferromagnetic Resonance study of sputtered Ru(7 nm)/NiFe(t FM)/IrMn(6 nm)/Ru(5 nm) exchange-biased bilayers at X and Q-band microwave frequencies reveals the excitation of spin-wave and NiFe resonance modes. Angular variations of the in-plane resonance fields of spin-wave and NiFe resonance modes show the effect of the unidirectional anisotropy, which is about twice larger for the spin-wave mode due to spin pinning at the NiFe/IrMn interface. At Q-band frequency the angular variations of in-plane resonance fields also reveal the symmetry of a uniaxial anisotropy. A modified theoretical model which also includes the contribution of a rotatable anisotropy provides a good description of the experimental results.

AB - Ferromagnetic Resonance study of sputtered Ru(7 nm)/NiFe(t FM)/IrMn(6 nm)/Ru(5 nm) exchange-biased bilayers at X and Q-band microwave frequencies reveals the excitation of spin-wave and NiFe resonance modes. Angular variations of the in-plane resonance fields of spin-wave and NiFe resonance modes show the effect of the unidirectional anisotropy, which is about twice larger for the spin-wave mode due to spin pinning at the NiFe/IrMn interface. At Q-band frequency the angular variations of in-plane resonance fields also reveal the symmetry of a uniaxial anisotropy. A modified theoretical model which also includes the contribution of a rotatable anisotropy provides a good description of the experimental results.

KW - Anisotropy

KW - Exchange bias

KW - Ferromagnetic resonance

KW - Magnetic bilayers

KW - Spin pinning

KW - Spin wave resonance

UR - http://www.scopus.com/inward/record.url?scp=84903998657&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2014.05.050

DO - 10.1016/j.physb.2014.05.050

M3 - Artículo

AN - SCOPUS:84903998657

SN - 0921-4526

VL - 450

SP - 167

EP - 172

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers

Abstract

Bibliographical note

Keywords

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