Coexistence of the magnetically ordered and Haldane states in (Y1-xNdx)2BaNiO5 Elena Popova, Sergei Klimin, Marina Popova, RÜdiger Klingeler, Bernd BÜchner and Alexander Vasiliev EPJ Web Conf., 185 (2018) 03003 Published online: 04 July 2018 DOI: 10.1051/epjconf/201818503003