Microstructural and elastic behaviour of OCMG-processed NdBaCuO materials

S. Neeleshwar, P. Venugopal Reddy, Muralidhar Miryala, Michael Rudolf Koblischka, Masato Murakami

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A systematic investigation of an HTSC material viz; Nd1.8Ba2.4Cu3.4Oy superconductor prepared by the oxygen controlled melt growth (OCMG) process has been undertaken by studying its microstructure and elastic behaviour. The results are compared with those obtained on samples prepared by melt powder melt growth (MPMG) processed YBa2Cu3Oy material. The X-ray diffraction studies of the new material clearly indicate the predominant structure of NdBa2Cu3Oy. The microstructural investigations performed by means of optical and scanning electron microscopy confirm the presence of a second phase formed due to the uniform distribution of Nd4Ba2Cu2O10 (Nd-422) particles of size 1-12 μm size in the Nd-123 matrix. Further, magnetization measurements also show that the sample exhibits a pronounced secondary peak effect along with a critical current density value of 36 000 A/cm2 at T = 77 K in a field of 1.6 T applied parallel to the c-axis. Finally, the ultrasonic velocity measurements reveal that the elastic anomalies generally observed among most of the RE-123 materials, especially in the temperature region of 100-250 K are totally absent in the case of Nd-123 of the present investigation.

Original languageEnglish
Pages (from-to)164-169
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume65
Issue number3
DOIs
Publication statusPublished - 1999 Nov 30
Externally publishedYes

Fingerprint

Oxygen
oxygen
Ultrasonic velocity measurement
velocity measurement
high temperature superconductors
critical current
ultrasonics
Powders
anomalies
current density
Superconducting materials
Magnetization
magnetization
microstructure
scanning electron microscopy
matrices
diffraction
X ray diffraction
Microstructure
Scanning electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

@article{d4c120847c5a41059ef4a4aae3fcca39,
title = "Microstructural and elastic behaviour of OCMG-processed NdBaCuO materials",
abstract = "A systematic investigation of an HTSC material viz; Nd1.8Ba2.4Cu3.4Oy superconductor prepared by the oxygen controlled melt growth (OCMG) process has been undertaken by studying its microstructure and elastic behaviour. The results are compared with those obtained on samples prepared by melt powder melt growth (MPMG) processed YBa2Cu3Oy material. The X-ray diffraction studies of the new material clearly indicate the predominant structure of NdBa2Cu3Oy. The microstructural investigations performed by means of optical and scanning electron microscopy confirm the presence of a second phase formed due to the uniform distribution of Nd4Ba2Cu2O10 (Nd-422) particles of size 1-12 μm size in the Nd-123 matrix. Further, magnetization measurements also show that the sample exhibits a pronounced secondary peak effect along with a critical current density value of 36 000 A/cm2 at T = 77 K in a field of 1.6 T applied parallel to the c-axis. Finally, the ultrasonic velocity measurements reveal that the elastic anomalies generally observed among most of the RE-123 materials, especially in the temperature region of 100-250 K are totally absent in the case of Nd-123 of the present investigation.",
author = "S. Neeleshwar and Reddy, {P. Venugopal} and Muralidhar Miryala and Koblischka, {Michael Rudolf} and Masato Murakami",
year = "1999",
month = "11",
day = "30",
doi = "10.1016/S0921-5107(99)00217-2",
language = "English",
volume = "65",
pages = "164--169",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
issn = "0921-5107",
publisher = "Elsevier BV",
number = "3",

}

TY - JOUR

T1 - Microstructural and elastic behaviour of OCMG-processed NdBaCuO materials

AU - Neeleshwar, S.

AU - Reddy, P. Venugopal

AU - Miryala, Muralidhar

AU - Koblischka, Michael Rudolf

AU - Murakami, Masato

PY - 1999/11/30

Y1 - 1999/11/30

N2 - A systematic investigation of an HTSC material viz; Nd1.8Ba2.4Cu3.4Oy superconductor prepared by the oxygen controlled melt growth (OCMG) process has been undertaken by studying its microstructure and elastic behaviour. The results are compared with those obtained on samples prepared by melt powder melt growth (MPMG) processed YBa2Cu3Oy material. The X-ray diffraction studies of the new material clearly indicate the predominant structure of NdBa2Cu3Oy. The microstructural investigations performed by means of optical and scanning electron microscopy confirm the presence of a second phase formed due to the uniform distribution of Nd4Ba2Cu2O10 (Nd-422) particles of size 1-12 μm size in the Nd-123 matrix. Further, magnetization measurements also show that the sample exhibits a pronounced secondary peak effect along with a critical current density value of 36 000 A/cm2 at T = 77 K in a field of 1.6 T applied parallel to the c-axis. Finally, the ultrasonic velocity measurements reveal that the elastic anomalies generally observed among most of the RE-123 materials, especially in the temperature region of 100-250 K are totally absent in the case of Nd-123 of the present investigation.

AB - A systematic investigation of an HTSC material viz; Nd1.8Ba2.4Cu3.4Oy superconductor prepared by the oxygen controlled melt growth (OCMG) process has been undertaken by studying its microstructure and elastic behaviour. The results are compared with those obtained on samples prepared by melt powder melt growth (MPMG) processed YBa2Cu3Oy material. The X-ray diffraction studies of the new material clearly indicate the predominant structure of NdBa2Cu3Oy. The microstructural investigations performed by means of optical and scanning electron microscopy confirm the presence of a second phase formed due to the uniform distribution of Nd4Ba2Cu2O10 (Nd-422) particles of size 1-12 μm size in the Nd-123 matrix. Further, magnetization measurements also show that the sample exhibits a pronounced secondary peak effect along with a critical current density value of 36 000 A/cm2 at T = 77 K in a field of 1.6 T applied parallel to the c-axis. Finally, the ultrasonic velocity measurements reveal that the elastic anomalies generally observed among most of the RE-123 materials, especially in the temperature region of 100-250 K are totally absent in the case of Nd-123 of the present investigation.

UR - http://www.scopus.com/inward/record.url?scp=0033341928&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033341928&partnerID=8YFLogxK

U2 - 10.1016/S0921-5107(99)00217-2

DO - 10.1016/S0921-5107(99)00217-2

M3 - Article

AN - SCOPUS:0033341928

VL - 65

SP - 164

EP - 169

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

SN - 0921-5107

IS - 3

ER -