Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3

Tuomas H. E. Lahtinen; Sebastiaan van Dijken

doi:10.1063/1.4795529

Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3

Materials Science 2014-01-17 v2

Authors: Tuomas H. E. Lahtinen , Sebastiaan van Dijken

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Abstract

This paper reports on the temperature evolution of local elastic interactions between ferromagnetic CoFe films and ferroelectric BaTiO3 substrates. Polarization microscopy measurements indicate that growth-induced stripe domains in the CoFe films are preserved and strengthened during cooling and heating through the structural phase transitions of BaTiO3. Moreover, rotation of the magnetic easy axes at the tertragonal-to-orthorhombic transition (T = 278 K) and at T = 380 K simultaneously switches the local magnetization of both uniaxial domains by 90 degrees. Irreversible changes in the ferromagnetic domain pattern are induced when the room-temperature ferroelectric domain structure is altered after temperature cycling.

Keywords

multiferroic CoFe/BaTiO3 magnetic anisotropy stripe domains ferromagnetic/ferroelectric coupling temperature control domain switching

Cite

@article{arxiv.1301.5462,
  title  = {Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3},
  author = {Tuomas H. E. Lahtinen and Sebastiaan van Dijken},
  journal= {arXiv preprint arXiv:1301.5462},
  year   = {2014}
}

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