TY - JOUR
T1 - Ultrasonic study of oxygen related structures in Nd123 between 80 and 400 K
AU - Anderson, A. R.
AU - Murakami, M.
AU - Chikumoto, N.
AU - Russell, G. J.
N1 - Funding Information:
This research was partially supported by NEDO and JISTEC.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999/10/29
Y1 - 1999/10/29
N2 - This paper reports on an ultrasonic study at 130 kHz region in melt-textured Nd123, i.e. NdBa2Cu3O7-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.
AB - This paper reports on an ultrasonic study at 130 kHz region in melt-textured Nd123, i.e. NdBa2Cu3O7-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.
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U2 - 10.1016/S0921-5107(99)00200-7
DO - 10.1016/S0921-5107(99)00200-7
M3 - Article
AN - SCOPUS:0033204582
SN - 0921-5107
VL - 65
SP - 69
EP - 73
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
IS - 1
ER -