Abstract
We fabricated MgB2 samples with Ag additions using in situ solid-state reaction via a single-step sintering to study the effect of Ag on the structural, vibration, and superconducting properties of MgB2 samples. Ag addition to MgB2 resulted in a significant improvement in Jc although no appreciable effect was observed in the lattice parameters and the superconducting transition temperature Tc. Dramatic increase in the grain size was observed with Ag addition and topographic measurements with atomic force microscopy revealed the formation of Ag–Mg nanoparticles 5–20 nm in size at 2 and 4 wt% Ag additions. The fact that these samples showed high Jc values suggests that the nanoparticles formed as a result of Ag addition are responsible for enhanced flux pinning. Raman spectroscopy measurements showed that Ag additions also increased disorder in the system and thereby affected the line width of the Raman active E2g mode.
| Original language | English |
|---|---|
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Journal of Superconductivity and Novel Magnetism |
| DOIs | |
| Publication status | Accepted/In press - 2017 Dec 9 |
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Keywords
- Ag-added MgB
- Atomic Force Microscopy (AFM)
- Critical current density (J)
- Raman spectroscopy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Effect of Ag Addition on the Surface Topography and the Vibrational Dynamics of MgB2. / Kumar, Dinesh; Miryala, Muralidhar; Rao, M. S.Ramachandra; Murakami, Masato.
In: Journal of Superconductivity and Novel Magnetism, 09.12.2017, p. 1-6.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Ag Addition on the Surface Topography and the Vibrational Dynamics of MgB2
AU - Kumar, Dinesh
AU - Miryala, Muralidhar
AU - Rao, M. S.Ramachandra
AU - Murakami, Masato
PY - 2017/12/9
Y1 - 2017/12/9
N2 - We fabricated MgB2 samples with Ag additions using in situ solid-state reaction via a single-step sintering to study the effect of Ag on the structural, vibration, and superconducting properties of MgB2 samples. Ag addition to MgB2 resulted in a significant improvement in Jc although no appreciable effect was observed in the lattice parameters and the superconducting transition temperature Tc. Dramatic increase in the grain size was observed with Ag addition and topographic measurements with atomic force microscopy revealed the formation of Ag–Mg nanoparticles 5–20 nm in size at 2 and 4 wt% Ag additions. The fact that these samples showed high Jc values suggests that the nanoparticles formed as a result of Ag addition are responsible for enhanced flux pinning. Raman spectroscopy measurements showed that Ag additions also increased disorder in the system and thereby affected the line width of the Raman active E2g mode.
AB - We fabricated MgB2 samples with Ag additions using in situ solid-state reaction via a single-step sintering to study the effect of Ag on the structural, vibration, and superconducting properties of MgB2 samples. Ag addition to MgB2 resulted in a significant improvement in Jc although no appreciable effect was observed in the lattice parameters and the superconducting transition temperature Tc. Dramatic increase in the grain size was observed with Ag addition and topographic measurements with atomic force microscopy revealed the formation of Ag–Mg nanoparticles 5–20 nm in size at 2 and 4 wt% Ag additions. The fact that these samples showed high Jc values suggests that the nanoparticles formed as a result of Ag addition are responsible for enhanced flux pinning. Raman spectroscopy measurements showed that Ag additions also increased disorder in the system and thereby affected the line width of the Raman active E2g mode.
KW - Ag-added MgB
KW - Atomic Force Microscopy (AFM)
KW - Critical current density (J)
KW - Raman spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85037611409&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037611409&partnerID=8YFLogxK
U2 - 10.1007/s10948-017-4481-y
DO - 10.1007/s10948-017-4481-y
M3 - Article
SP - 1
EP - 6
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
ER -