Publication details

X-ray absorption study of the ferromagnetic Cu moment at the YBa2Cu3O7/La2/3Ca1/3MnO3 interface and variation of its exchange interaction with the Mn moment

Authors

SEN K. PERRET E. ALBERCA A. URIBE-LAVERDE M. A. MAROZAU I. YAZDI-RIZI M. MALLETT B. P. P. MARŠÍK Přemysl PIAMONTEZE C. KHAYDUKOV Y. DÖBELI M. KELLER T. BIŠKUP N. VARELA M. VAŠÁTKO Jiří MUNZAR Dominik BERNHARD Christian

Year of publication 2016
Type Article in Periodical
Magazine / Source Physical Review B
MU Faculty or unit

Central European Institute of Technology

Citation
Web Článek na www str. nakladatele.
Doi http://dx.doi.org/10.1103/PhysRevB.93.205131
Field Solid matter physics and magnetism
Keywords Cuprate superconductors; Infrared response; Collective modes
Description With x-ray absorption spectroscopy and polarized neutron reflectometry we studied how the magnetic proximity effect at the interface between the cuprate high-TC superconductor YBa2Cu3O7 (YBCO) and the ferromagnet La2/3Ca1/3MnO3 (LCMO) is related to the electronic and magnetic properties of the LCMO layers. In particular, we explored how the magnitude of the ferromagnetic Cu moment on the YBCO side depends on the strength of the antiferromagnetic (AF) exchange coupling with the Mn moment on the LCMO side. We found that the Cu moment remains sizable if the AF coupling with the Mn moments is strongly reduced or even entirely suppressed. The ferromagnetic order of the Cu moments thus seems to be intrinsic to the interfacial CuO2 planes and related to a weakly ferromagnetic intraplanar exchange interaction. The latter is discussed in terms of the partial occupation of the Cu 3d3z2 - r2 orbitals, which occurs in the context of the so-called orbital reconstruction of the interfacial Cu ions.
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