Electrocaloric effect
A reversible temperature change in ferroelectric materials under an applied electric field.
Magnetoelectric/multiferroic materials
Ferroelectric/ferromagnetic composites like composite of PFN-PT and CoFe2O4
Single Phase like Co4Nb2O4
High temperature superconductivity
BSCCO: wires, bulk samples
Magnetic materials
manganites, soft and hard ferittes, Heusler alloys, transition metal oxides, ...