Conveners
Section S9: Multifunctional magnetic materials (multiferroic, magnetoelastic, shape memory, …)
- Piotr Gębara (Department of Physics, Częstochowa University of Technology)
Artificial magnetoelectric multiferroic heterostructures, which combine multiple ferroic orders, have high potential for next-generation electronic devices. With device downscaling, the interface plays an increasingly important role and deserves special consideration. Oxide films are especially well suited for such applications. We combined Co [1] and Ni [2] ferrite layers, which bring their...
In my presentation I will review the latest progress in understanding elastomagnetic multiferroic behavior of Ni-Mn-Ga Heusler alloys called magnetic shape memory effects [1]. These phenomena are underlined by displacive and diffusionless phase transformation from cubic to lower symmetry phase called martensitic transformation. Apart from temperature the transformation can be induced by...
Chemical modifications in the iron site of BiFeO$_3$ represent the direct approach to tune the magnetic behaviour of this material. However, using the conventional synthesis routes, it is possible to achieve the substitution rates of a few atomic percent only. Most of the reported single-phase BiFe$_{1−y}$B$^{3+}_{y}$O$_3$ perovskite compositions with $y > 0.1$ were prepared via high-pressure...
Ferromagnetic resonance (FMR) is a unique technique used to determine fundamental properties of the studied magnetic material, such as magnetocrystalline anisotropy, $g$-factor, exchange constant, Gilbert damping, etc. in single crystals (SCs) or magnetic interactions between layers and components in multilayered nanostructured films and foils [1]. Ni-Mn-Ga Heusler alloys are a subclass of...
The A$_4$M$_2$O$_9$ family (A = divalent cations; M = Nb/Ta), which typically adopts a trigonal P$\overline{3}c$1 structure derived from corundum, exhibits magnetoelectric (ME) properties in antiferromagnetic compounds such as Co$_4$Nb$_2$O$_9$. Ni$_4$Nb$_2$O$_9$ stands out as an exception, crystallizing in a different but close structure described in the orthorhombic $Pbcn$ space group that...
