Spin-valve effects in point contacts to exchange biased Co40Fe40B20films
نویسندگان
چکیده
منابع مشابه
Level splittings in exchange-biased spin tunneling
The level splittings in a dimer with the antiferromagnetic coupling between two single-molecule magnets are calculated perturbatively for arbitrary spin. It is found that the exchange interaction between two single-molecule magnets plays an important role in the level splitting. The results are discussed in comparison with the recent experiment. 75.45.+j, 75.50.Xx, 75.50.Tt Typeset using REVTEX...
متن کاملSpontaneous spin polarization in quantum point contacts.
We use spatial spin separation by a magnetic focusing technique to probe the polarization of quantum point contacts. The point contacts are fabricated from p-type GaAs/AlGaAs heterostructures. A finite polarization is measured in the low-density regime, when the conductance of a point contact is tuned to < 2e2/h. Polarization is stronger in samples with a well-defined "0.7 structure."
متن کاملInfluence of Base Pressure on FeMn Exchange Biased Spin-valve Films
Spin-valve films of structure NiFeCo/Co/Cu/NiFeCo(Co)/FeMn/Cu were deposited on Si substrates by DC planetary magnetron sputtering techniques. The influence of base pressure, P,, on spin-valve properties was studied by varying P, over two decades from 3x10-’ to 7~10~~ Torr. The GMR ratio show a slight increase with increasing P, until a large decrease occurs at Pd3.3~1 W6 Torr. Exchange bias fi...
متن کاملSpin Dynamics in Exchange-biased F/af Bilayers
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.
متن کاملDetection of spin polarization in quantum point contacts
We use spatial spin separation by a magnetic focusing technique to probe the polarization of quantum point contacts. The point contacts are fabricated from p-type GaAs/AlGaAs heterostructures. A finite polarization is measured in the low density regime, when the conductance of a point contact is tuned to <2e2/h. Polarization is stronger in samples with a well defined ‘0.7 structure’. (Some figu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Low Temperature Physics
سال: 2014
ISSN: 1063-777X,1090-6517
DOI: 10.1063/1.4897413