TY - JOUR
T1 - Effects of the APC materials on c-axis correlated pinning effects in a-axis oriented Y123/2D APC multilayer films
AU - Takamura, M.
AU - Mukaida, Masashi
AU - Horii, S.
AU - Ichinose, A.
AU - Kita, R.
AU - Namba, M.
AU - Awaji, S.
AU - Watanabe, K.
AU - Matsumoto, K.
AU - Yoshida, Y.
AU - Teranishi, Ryo
AU - Yamada, K.
AU - Mori, N.
PY - 2009/10/15
Y1 - 2009/10/15
N2 - For a-axis oriented and c-axis in-plane aligned YBa2Cu3O7-δ/artificial pinning center (Y123/APC) alternately-layered thin films, effects of the APC materials on the multilayer structures are discussed. Pr123, (Y1-xPrx)123 and Gd2CuO4(Gd214) were used as APCs. The multilayer structure was observed for Y123/Pr123 films and Y123/Gd214 films. However, some grains are also grown in the Y123/Gd214 film. For the Y123/Pr123 multilayer film, each Pr123 layer act as two-dimensional APCs (2D APCs) in the magnetic field angular dependences of the critical current density. The growth mechanism of the multilayer structure in the Y123/2D APC films is discussed by a transmission electron microscopy and an atomic force microscope. It is found that two conditions are needed to obtain the c-axis correlated pinning effects by 2D APC in the a-axis oriented and c-axis in-plane aligned Y123/APC multilayer films: the same structure as Y123; Y-free APC materials.
AB - For a-axis oriented and c-axis in-plane aligned YBa2Cu3O7-δ/artificial pinning center (Y123/APC) alternately-layered thin films, effects of the APC materials on the multilayer structures are discussed. Pr123, (Y1-xPrx)123 and Gd2CuO4(Gd214) were used as APCs. The multilayer structure was observed for Y123/Pr123 films and Y123/Gd214 films. However, some grains are also grown in the Y123/Gd214 film. For the Y123/Pr123 multilayer film, each Pr123 layer act as two-dimensional APCs (2D APCs) in the magnetic field angular dependences of the critical current density. The growth mechanism of the multilayer structure in the Y123/2D APC films is discussed by a transmission electron microscopy and an atomic force microscope. It is found that two conditions are needed to obtain the c-axis correlated pinning effects by 2D APC in the a-axis oriented and c-axis in-plane aligned Y123/APC multilayer films: the same structure as Y123; Y-free APC materials.
UR - http://www.scopus.com/inward/record.url?scp=68149117280&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=68149117280&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2009.05.225
DO - 10.1016/j.physc.2009.05.225
M3 - Article
AN - SCOPUS:68149117280
SN - 0921-4534
VL - 469
SP - 1545
EP - 1549
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 15-20
ER -