TY - JOUR
T1 - Magnetic phase diagrams of electron-doped high-Tc cuprates Pr1-xLaCexCuO4-δ and Nd2-xCexCuO4-δ studied by μSR measurements
AU - Kubo, T.
AU - Uefuji, T.
AU - Fujita, M.
AU - Yamada, K.
AU - Watanabe, I.
AU - Nagamine, K.
N1 - Funding Information:
This work was supported in part by the Japanese Ministry of Education, Culture, Sports, Science and Technology, Grant-in-Aid for Scientific Research on Priority Areas (Novel Quantum Phenomena in Transition Metal Oxides), 12046239, 2000, for Scientific Research (A), 10304026, 2000 and for Encouragement of Young Scientists, 13740216, 2001, by the Japan Science and Technology Corporation, the Core Research for Evolutional Science and Technology Project (CREST).
PY - 2002/10/1
Y1 - 2002/10/1
N2 - Magnetic phase diagrams of electron-doped high-temperature superconducting (SC) cuprates Nd2-xCexCuO4-δ (NCCO) and Pr1-xLaCexCuO4-δ (PLCCO) has been studied by means of muon spin relaxation and rotation (μSR) measurements. Two characteristic temperatures TN1 and TN2 are defined in the zero-field μSR (ZF-μSR) measurements for both NCCO and PLCCO. Below T = TN1, which approximately corresponds to the previously reported Néel temperature, an exponential type muon spin relaxation firstly appears in the time spectra and upon cooling below around TN2 another faster component of relaxation or muon spin rotation is observed similarly. Although critical concentration for the bulk superconductivity is different between the two systems, antiferromagnetic (AF) phase contacts with the SC phase partially overlapping in both systems and AF phase is suddenly reduced in the appearance of SC phase, suggesting a competition between superconductivity and AF order. Our quantitative analyses of the AF volume fraction clearly demonstrate this.
AB - Magnetic phase diagrams of electron-doped high-temperature superconducting (SC) cuprates Nd2-xCexCuO4-δ (NCCO) and Pr1-xLaCexCuO4-δ (PLCCO) has been studied by means of muon spin relaxation and rotation (μSR) measurements. Two characteristic temperatures TN1 and TN2 are defined in the zero-field μSR (ZF-μSR) measurements for both NCCO and PLCCO. Below T = TN1, which approximately corresponds to the previously reported Néel temperature, an exponential type muon spin relaxation firstly appears in the time spectra and upon cooling below around TN2 another faster component of relaxation or muon spin rotation is observed similarly. Although critical concentration for the bulk superconductivity is different between the two systems, antiferromagnetic (AF) phase contacts with the SC phase partially overlapping in both systems and AF phase is suddenly reduced in the appearance of SC phase, suggesting a competition between superconductivity and AF order. Our quantitative analyses of the AF volume fraction clearly demonstrate this.
KW - Electron-doped high-T
KW - NCCO
KW - Néel temperature
KW - PLCCO
KW - Phase diagram
KW - μSR
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U2 - 10.1016/S0921-4534(02)01444-2
DO - 10.1016/S0921-4534(02)01444-2
M3 - Article
AN - SCOPUS:0036789036
VL - 378-381
SP - 354
EP - 359
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -