Nanoscale magnetization inhomogeneity within single phase nanopillars.

ABSTRACT: We report observation of a radial dependence in the magnetic anisotropy of epitaxially strained CoFe₂O₄ nanopillars in a BaTiO₃ matrix. This archetypal example of a multiferroic heterostructure with a self-assembling three-dimensional architecture possesses significant out-of-plane uniaxial magnetic anisotropy. The anisotropy originates from the large magnetostriction of CoFe₂O₄ and the state of stress within the nanocomposite. Magnetometry suggests the existence of two magnetic phases with different anisotropies. Micromagnetic simulations of a core-shell magnetic anisotropy qualitatively reproduce features of the magnetic hysteresis and elucidate the magnetization reversal mechanism: The magnetization initially reorients within the pi

SUBMITTER: Farmer TO 

PROVIDER: S-EPMC11474935 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature