https://doi.org/10.1140/e10051-002-0003-0
Coexistence of ferromagnetism and superconductivity in Cu-rich lanthanum Cu-oxides
1
National Laboratory for Superconductivity, Institute of Physics & Center for Condensed Matter Physics, Chinese
Academy of Sciences, PO Box 603, Beijing 100080, PR China
2
Beijing Laboratory of Electron Microscopy, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy
of Sciences, Beijing 100080, PR China
3
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
4
Department of Physics, Hunan University, Changsha 410082, PR China
5
Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA and
Department of Physics, Chinese University of Hong Kong, Shatin, Hong Kong
Corresponding author: a brzhao@aphy.iphy.ac.cn
Received:
17
October
2001
Published online: 15 January 2002
We have measured the zero field and field cooled magnetization of
the lightly oxygen doped Cu-rich La2CuO
in a wide
temperature range (5 K to 350 K). The data together with the evolution
of the magnetic hysteresis loop suggest that the
ferromagnetism with Curie temperature of 280 K coexists with
superconductivity below the transition temperature 
K. The coexistence
occurs in the hole-rich clusters of size 
nm, which are electronic
phase separated from the hole-poor antiferromagnetic background.
PACS: 74.72.Dn – La-based cuprates / 74.25.Ha – Magnetic properties / 74.90.+n – Other topics in superconductivity
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
