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 -