TY - GEN
T1 - Oxide formation during flight of ablated fragments
AU - Eryu, Osamu
AU - Yamaoka, Kenji
AU - Masuda, Kohzoh
PY - 1993
Y1 - 1993
N2 - Collision processes between oxygen molecules and laser ablated fragments from YBa2Cu3Oy superconductor target are described. The space/time resolved photo-emission measurements of Cu and CuO were carried out in order to investigate the oxidation of the laser ablated fragments in O2 atmosphere. Increase of the photo-emission yield of CuO was observed over 100 mTorr and it showed maximum at 2 Torr. Velocity of CuO decreases abruptly at 200 mTorr. The velocity distribution spreads above 500 mTorr. An optimum range of oxygen pressure to fabricate superconducting thin films of Tc = 90 K was from 250 mTorr to 500 mTorr. Process of the reactive collisions of ablated fragments with O2 molecules in this range is discussed.
AB - Collision processes between oxygen molecules and laser ablated fragments from YBa2Cu3Oy superconductor target are described. The space/time resolved photo-emission measurements of Cu and CuO were carried out in order to investigate the oxidation of the laser ablated fragments in O2 atmosphere. Increase of the photo-emission yield of CuO was observed over 100 mTorr and it showed maximum at 2 Torr. Velocity of CuO decreases abruptly at 200 mTorr. The velocity distribution spreads above 500 mTorr. An optimum range of oxygen pressure to fabricate superconducting thin films of Tc = 90 K was from 250 mTorr to 500 mTorr. Process of the reactive collisions of ablated fragments with O2 molecules in this range is discussed.
UR - https://www.scopus.com/pages/publications/0027152399
UR - https://www.scopus.com/pages/publications/0027152399#tab=citedBy
M3 - Conference contribution
AN - SCOPUS:0027152399
SN - 1558991808
T3 - Materials Research Society Symposium Proceedings
SP - 57
EP - 61
BT - Materials Research Society Symposium Proceedings
PB - Publ by Materials Research Society
T2 - Laser Ablation in Materials Processing: Fundamentals and Applications
Y2 - 1 December 1992 through 4 December 1992
ER -