TRIUMF

Exp. No.

M1678 — Approved

Title of Experiment

μSR study for magnetic polarization on apical oxygen in Ruddlesden Popper series

Spokesperson(s) for Group

Safety Coordinator(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
R. Kadono KEK-IMSS Professor
M. Miyazaki Muroran Institute of Technology Assistant Professor
T. Adachi Sophia University Associate Professor
S. Asano Tohoku University Student (Graduate)
S. Ebisu Muroran Institute of Technology Professor
M. Fujita IMR Tohoku University Professor
H. Ishoda Muroran Institute of Technology Associate Professor
T. Kawamata Tohoku University Assistant Professor
Y. Koike Tohoku University Professor

Abstract

MuSR is best technique to detect magnetic polarization on oxygen. La2CuO4 show dielectric anomaly around room temperature. La2-xSrxNiO4 show dielectric breakdown at E>10^3-4, and turn to insulator to metallic. These are similar situation with Sr2IrO4 and Ca2RuO4, which suggest multiferroic behavior around apical oxygen. The existence of oxygen polarization will offer us new insight into the origin of Mott-insulator transition.