On the use of differential permeability and magnetic Barkhausen Noise Measurements for Magnetic NDT Applications - Ktena, Aphrodite; Hasicic, Mehrija; Landgraf, Fernando José Gomes; Moudilou, Eleni; Angelopoulos, Spyridon; Hristoforou, Evangelos (Journal of Magnetism and Magnetic Materials, 2022)