TY - JOUR
T1 - X-ray and electron diffraction study of a precipitation phase in Nd 1.85Ce0.15CuO4+y single crystal
AU - Kimura, Hiroyuki
AU - Noda, Yukio
AU - Sato, Futami
AU - Tsuda, Kenji
AU - Kurahashi, Kenji
AU - Uefuji, Tetsushi
AU - Fujita, Masaki
AU - Yamada, Kazuyoshi
PY - 2005/8
Y1 - 2005/8
N2 - X-ray diffraction measurements have been performed to investigate a crystal structure of a precipitation phase in oxygen-reduced Nd1.85Ce 0.15CuO4+y (NCCO). A detailed structure analysis of the precipitation phase as well as the parent NCCO phase revealed that the precipitation phase is a cubic (Nd,Ce)2O3, which is distorted tetragonally by the surrounding NCCO phase. The averaged grain size of the precipitation phase exceeds 200 Å parallel to the CuO2 plane of the parent NCCO, while the size along layered direction is short-ranged (∼30 Å). The grain thickness along layered direction is strongly correlated with the homogeneity of superconducting state. The volume fraction of the (Nd,Ce)2O3 phase is about 2%. We also performed electron diffraction as well as microscopy experiment, which confirms that the (Nd,Ce)2O3 phase segregate from the parent NCCO phase and exists as an epitaxial layer along the c-axis.
AB - X-ray diffraction measurements have been performed to investigate a crystal structure of a precipitation phase in oxygen-reduced Nd1.85Ce 0.15CuO4+y (NCCO). A detailed structure analysis of the precipitation phase as well as the parent NCCO phase revealed that the precipitation phase is a cubic (Nd,Ce)2O3, which is distorted tetragonally by the surrounding NCCO phase. The averaged grain size of the precipitation phase exceeds 200 Å parallel to the CuO2 plane of the parent NCCO, while the size along layered direction is short-ranged (∼30 Å). The grain thickness along layered direction is strongly correlated with the homogeneity of superconducting state. The volume fraction of the (Nd,Ce)2O3 phase is about 2%. We also performed electron diffraction as well as microscopy experiment, which confirms that the (Nd,Ce)2O3 phase segregate from the parent NCCO phase and exists as an epitaxial layer along the c-axis.
KW - Electron diffraction and microscopy
KW - High-T superconductivity
KW - Precipitation
KW - X-ray diffraction
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U2 - 10.1143/JPSJ.74.2282
DO - 10.1143/JPSJ.74.2282
M3 - Article
AN - SCOPUS:24644524045
SN - 0031-9015
VL - 74
SP - 2282
EP - 2286
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 8
ER -