Abstract
The microstructure of the Ti-doped MgB2 which shows a significantly improved critical current density, Jc [Appl. Phys. Lett. 79, 1154 (2001)], is investigated. It is found that Ti does not occupy the atomic site in the MgB2 crystal structure, but forms a thin TiB 2 layer (with a thickness about one unit cell of TiB2) in the grain boundaries of MgB2. Besides, MgB2 grains are greatly refined by Ti doping, forming a strongly coupled nanoparticle structure. It is argued that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take responsibility for the enhancement of Jc in the Ti-doped MgB2 bulk superconductor.
| Original language | English |
|---|---|
| Pages (from-to) | 1640-1642 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 80 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2002 Mar 4 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries. / Zhao, Y.; Huang, D. X.; Feng, Y.; Cheng, C. H.; MacHi, T.; Koshizuka, N.; Murakami, Masato.
In: Applied Physics Letters, Vol. 80, No. 9, 04.03.2002, p. 1640-1642.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries
AU - Zhao, Y.
AU - Huang, D. X.
AU - Feng, Y.
AU - Cheng, C. H.
AU - MacHi, T.
AU - Koshizuka, N.
AU - Murakami, Masato
PY - 2002/3/4
Y1 - 2002/3/4
N2 - The microstructure of the Ti-doped MgB2 which shows a significantly improved critical current density, Jc [Appl. Phys. Lett. 79, 1154 (2001)], is investigated. It is found that Ti does not occupy the atomic site in the MgB2 crystal structure, but forms a thin TiB 2 layer (with a thickness about one unit cell of TiB2) in the grain boundaries of MgB2. Besides, MgB2 grains are greatly refined by Ti doping, forming a strongly coupled nanoparticle structure. It is argued that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take responsibility for the enhancement of Jc in the Ti-doped MgB2 bulk superconductor.
AB - The microstructure of the Ti-doped MgB2 which shows a significantly improved critical current density, Jc [Appl. Phys. Lett. 79, 1154 (2001)], is investigated. It is found that Ti does not occupy the atomic site in the MgB2 crystal structure, but forms a thin TiB 2 layer (with a thickness about one unit cell of TiB2) in the grain boundaries of MgB2. Besides, MgB2 grains are greatly refined by Ti doping, forming a strongly coupled nanoparticle structure. It is argued that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take responsibility for the enhancement of Jc in the Ti-doped MgB2 bulk superconductor.
UR - http://www.scopus.com/inward/record.url?scp=79956023991&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79956023991&partnerID=8YFLogxK
U2 - 10.1063/1.1456969
DO - 10.1063/1.1456969
M3 - Article
AN - SCOPUS:79956023991
VL - 80
SP - 1640
EP - 1642
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 9
ER -