التفاصيل البيبلوغرافية
| العنوان: |
Spin waves in exchange-biased NiFe/IrMn circular nanorings. |
| المؤلفون: |
Tacchi, S.1, Madami, M.1, Gubbiotti, G.1, Carlotti, G.2, Jung, W.3, Ross, C. A.3 |
| المصدر: |
Journal of Applied Physics. Apr2008, Vol. 103 Issue 7, p07C103. 3p. |
| مستخلص: |
We present the experimental investigation of the static and dynamical properties of NiFe(20 nm)/IrMn(5 nm) rings. Magneto-optic Kerr effect measurements show that the IrMn introduces a sizable exchange-bias field HEB≈80 Oe, which shifts the hysteresis loop along the excange-bias direction. Measured loops were satisfactorily reproduced using a micromagnetic calculation which includes the presence of HEB. Measurement of high frequency normal modes, by Brillouin light scattering, shows that the presence of the IrMn layer causes an overall up-shift of the spin wave frequency, in qualitative agreement with pervious studies of other exchange-biased systems. Moreover, the frequency asymmetry of the spin wave frequency upon reversing the external field is quantitatively consistent with the presence of the exchange-bias field measured by the Kerr effect. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
