منابع مشابه
Positive exchange bias in FeF2-Fe bilayers.
We have discovered a positive unidirectional exchange anisotropy in antiferromagnetic (FeF2) and ferromagnetic (Fe) bilayers cooled through the antiferromagnetic critical temperature TN in large magnetic fields. For low positive cooling fields, the ferromagnet’s magnetization (M-H) loop center shifts to negative fields, as is normally observed in other systems. In contrast, large cooling fields...
متن کاملSusceptibility of non-crystalline ferromagnetic FeF2
2014 In the temperature range 150 K > T > 25 K the magnetic susceptibility of noncrystalline FeF2 can be described by a Curie-Weiss law. A paramagnetic Curie temperature of 03B8 = (22 ± 1) K and an effective moment of peff = (5.2 ± 0.1) 03BCB are found. Temperature and field dependence of the magnetization between 15 K-20.5 K indicate superparamagnetic behaviour. At lower temperatures...
متن کاملPerpendicular coupling at Fe–FeF2 interfaces
We have studied the exchange anisotropy of ferromagnetic Fe films grown on antiferromagnetic FeF2 single crystals. The behavior of the hysteresis loops of the Fe above and below the Néel temperature TN of FeF2 indicates a 90° rotation of the ferromagnetic easy axis due to the antiferromagnetic ordering. By examining the Fe hysteresis loops together with the FeF2 susceptibility behavior we infer...
متن کاملRole of interfacial structure on exchange-biased FeF2-Fe
We have studied the effect of the interface structure on the exchange bias in the FeF2-Fe system, for FeF2 bulk single crystals or thin films. The exchange bias depends very strongly on the crystalline orientation of the antiferromagnet for both films and crystals. However, the interface roughness seems to have a strong effect mainly on the film systems. These results indicate that the exchange...
متن کاملShear Localization due to Strain Softening in Side Pressed Cylinders
In this paper, shear localization due to strain softening in sidepressed cylinders, is inverstigated. Shear localization causes formation of macroscopic shear bands which can be obsserved in the metallographic cross-section. In this paper, for the first time a method is presented in which a simple two-slice model is used to study the formation of shear bands. The results obtained form this mode...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1983
ISSN: 0163-1829
DOI: 10.1103/physrevb.28.1983