Magnetic Structure in Fe/Sm-Co Exchange Spring Bilayers with Intermixed Interfaces

Yaohua Liu; S. G. E. te Velthuis; J. S. Jiang; Y. Choi; S. D. Bader; A. A. Parizzi; H. Ambaye; V. Lauter

doi:10.1103/PhysRevB.83.174418

Magnetic Structure in Fe/Sm-Co Exchange Spring Bilayers with Intermixed Interfaces

Materials Science 2014-11-21 v1 Mesoscale and Nanoscale Physics

Authors: Yaohua Liu , S. G. E. te Velthuis , J. S. Jiang , Y. Choi , S. D. Bader , A. A. Parizzi , H. Ambaye , V. Lauter

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

The depth profile of the intrinsic magnetic properties in an Fe/Sm-Co bilayer fabricated under nearly optimal spring-magnet conditions was determined by complementary studies of polarized neutron reflectometry and micromagnetic simulations. We found that at the Fe/Sm-Co interface the magnetic properties change gradually at the length scale of 8 nm. In this intermixed interfacial region, the saturation magnetization and magnetic anisotropy are lower and the exchange stiffness is higher than values estimated from the model based on a mixture of Fe and Sm-Co phases. Therefore, the intermixed interface yields superior exchange coupling between the Fe and Sm-Co layers, but at the cost of average magnetization.

Keywords

magnetocaloric effect oxide interfaces magnetic nanoparticles

Cite

@article{arxiv.1012.5086,
  title  = {Magnetic Structure in Fe/Sm-Co Exchange Spring Bilayers with Intermixed Interfaces},
  author = {Yaohua Liu and S. G. E. te Velthuis and J. S. Jiang and Y. Choi and S. D. Bader and A. A. Parizzi and H. Ambaye and V. Lauter},
  journal= {arXiv preprint arXiv:1012.5086},
  year   = {2014}
}

Comments

16 pages, 6 figures and 1 table

Magnetic Structure in Fe/Sm-Co Exchange Spring Bilayers with Intermixed Interfaces

Abstract

Keywords

Cite

Comments

Related papers