Exchange bias and interface electronic structure inNi/Co3O4(011)

Large exchange bias and its connection to interface structure in FeF2–Fe bilayers

Large exchange bias effects (DE;1.1 erg/cm) were observed in antiferromagnetic ~FeF2) –ferromagnetic ~Fe! bilayers grown on MgO. The FeF2 grows along the spin-compensated ~110! direction. The FeF2–Fe interface roughness was characterized using specular and diffuse x-ray diffraction and atomic force microscopy. The magnitude of the exchange bias field HE increases as the interface roughness decr...

Anomalous exchange bias at collinear/noncollinear spin interface

We report on the interfacial magnetic coupling in manganite bilayers of collinear ferromagnetic La0.7Sr0.3MnO3 and noncollinear multiferroic TbMnO3. Exchange bias is observed at the Néel temperature of TbMnO3 (,41 K) due to the onset of long-range antiferromagnetic ordering in the Mn spin sublattice. Interestingly, an anomalous plateau of exchange bias emerges at the ordering temperature of Tb ...

Exchange biasing and interface structure in MnNiÕFe„Mo... bilayers

The role of magnetic, structural, and chemical roughness on the origin of exchange biasing in polycrystalline Mn52Ni48 /Fe92~Mo8) bilayers has been investigated by transmission x-ray magnetic circular dichroism ~XMCD!, vibrating sample magnetometry ~VSM!, and transmission electron microscopy ~TEM!. Three bilayer samples of MnNi~22 nm!/Fe~Mo! ~6 nm! were grown by molecular beam epitaxy under ult...

Electronic Structure and Exchange Integrals of Low-dimensional Cuprates

Role of the antiferromagnetic bulk spin structure on exchange bias.

The cooling field dependence of the exchange bias field in ferromagnet/antiferromagnet (FM/AF) multilayers demonstrates that the bulk AF spin structure plays a crucial role on the origin of exchange bias. FM/AF/FM trilayers were designed to eliminate any interlayer exchange coupling between the FM slabs. By choosing the magnetic cooling field, the AF is ordered below its Néel temperature with t...