Spin Dynamics in Exchange-biased F/af Bilayers

نویسنده

  • david. spenato
چکیده

The spin dynamics of the ferromagnetic pinned layer of ferro-antiferromagnetic coupled NiFe/MnNi bilayers is investigated in a broad frequency range (30 MHz-6 GHz). A phenomenological model based on the Landau-Lifshitz equation for the complex permeability of the F/AF bilayer is proposed. The experimental results are compared to theoretical predictions.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Asymmetric magnetization reversal in exchange biased polycrystalline F/AF bilayers

This paper describes a model for magnetization reversal in polycrystalline Ferromagnetic/Antiferromagnetic exchange biased bilayers. We assume that the exchange energy can be expanded into cosine power series. We show that it is possible to fit experimental asymmetric shape of hysteresis loops in exchange biased bilayer for any direction of the applied field. The hysteresis asymmetry is discuss...

متن کامل

Spin Structure at the Interface of Exchange Biased FeMn/Co Bilayers

The origin of exchange biasing in FeMn/Co bilayers is elucidated using magneto optic Kerr e ect and x-ray dichroism. It is found that interaction and interdi usion between the Co and FeMn layers strongly in uence the interface magnetic structure. For example, although the bulk spin structure of antiferromagnetic (AF) FeMn is noncollinear, about 4 ML of FeMn near the Co interface appear to take ...

متن کامل

Parallel versus antiparallel interfacial coupling in exchange biased Co/FeF2.

By using the surface and element specificity of soft x-ray magnetic dichroism we provide direct experimental evidence for two different types of interfacial uncompensated Fe moments in exchange biased Co/FeF2 bilayers. Some moments are pinned and coupled antiparallel to the ferromagnet (FM). They give rise to a positive exchange bias and vanish above T(N) = 78 together with the antiferromagnet ...

متن کامل

X-ray magnetic circular dichroism studies of „001...-oriented NiFe/Mn100−xPtx exchange bilayers

001 -oriented Ni80Fe20/Mn100−xPtx and Co90Fe10/Mn100−xPtx epitaxial bilayers were prepared using the molecular beam epitaxy method. Their exchange anisotropies were measured using a torque magnetometer, while their interfacial Mn uncompensated moments were measured by means of x-ray magnetic circular dichroism. The bilayers exhibited both oneand fourfold components in their anisotropy torque cu...

متن کامل

Spin-flop coupling and rearrangement of bulk antiferromagnetic spins in epitaxial exchange-biased Fe/MnPd/Fe/IrMn multilayers

The role of bulk antiferromagnetic spins on exchange bias was investigated in interface spin-flop coupled Fe/MnPd bilayers and Fe/MnPd/Fe/IrMn multilayers. Magnetic measurement of the bilayers showed that the exchange bias saturated at a uniquely large critical thickness, ∼300 Å, with a spin reorientation transition simultaneously observed. Field cooling of the multilayer, with parallel or anti...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003