DIFFERENTIAL SCANNING CALORIMETRY EVIDENCE OF COMPOSITIONAL MODULATION AND GIANT MAGNETOELASTIC WAVE AMPLITUDE IN ELECTRODEPOSITED CO-P RIBBONS

Ribbons of Co-P with a transverse structural modulation in phosphorus content were produced by electrolytic deposition at pulsed current den sity. The composition modulation was evidenced by relating electron di ffraction spectroscopy X-ray diffraction, and differential scanning ca lorimetry. In particular it was shown that the latter technique can re solve the presence of legions containing a high P atomic fraction from regions of low P content. A very high amplitude of magnetoelastic wav es,vas obtained in this type of Co-P ribbons. This result was explaine d in terms of the mixed non-magnetic and magnetic layer structure whic h was produced by compositional variations. The significant magnetoela stic properties show that the investigated material could be useful as piezomagnetic core in ultrasonic technology and radioelectronics.