Phase formation, phonon behavior, and magnetic properties of novel ferromagnetic La3BAlMnO9 (B=Co or Ni) triple perovskites

Abstract

In the quest for novel magnetoelectric materials, we have grown, stabilized and explored the properties of La 3 BAlMnO 9 (B = Co or Mn) thin films. In this paper, we report the influence of the growth parameters that promote B/Al/Mn ordering in the pseudo-cubic unit cell and their likely influence on the magnetic and multiferroic properties. The temperature dependence of the magnetization shows that La 3 CoAlMnO 9 is ferromagnetic up to 190 K while La 3 NiAlMnO 9 shows a T C of 130 K. The behavior of these films are compared and contrasted with related La 2 BMnO 6 double perovskites. It is observed that the insertion of AlO 6 octahedra between CoO 6 and MnO 6 suppresses significantly the strength of the superexchange interaction, spin-phonon and spin-polar coupling.2

Unusual effects of Ho3+ ion on magnetic properties of YFe0.5Cr0.5O3

“…Multiferroics are materials with ferroelectricity, magnetism and ferroelasticity coexistence, and the coupling of ferromagnetic (FM) and ferroelectric (FE) properties in such materials has enormous technological applications [1][2][3]. Magnetization reversal phenomenon have attracted considerable attention in recent years, motivated by both interest in the fundamental science and potential applications in magnetic storage devices, magnetic switches, and magnetic random access memories [4][5][6][7].…”