Abstract
This paper reports on an ultrasonic study at 130 kHz region in melt-textured Nd123, i.e. NdBa 2Cu 3O 7− δ with different oxygen levels, i.e. δ=0, 0.2, 0.4, 0.6, 1. Three ultrasonic attenuation peaks were identified, which were related to oxygen levels in the material. An ultrasonic attenuation peak in the 360 K region was found at higher oxygen levels, i.e. δ=0.2, 0.4, and appeared to be a characteristic of the orthorhombic phase of the material. An ultrasonic attenuation peak in the 160 K region occurred at lower oxygen levels, i.e. δ=0.4, 0.6, while a peak close to 320 K was found in deoxygenated Nd123. All ultrasonic attenuation peaks showed the characteristics of structural changes. This proposal is supported by ultrasonic velocity measurements which displayed discontinuities at the corresponding temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
