title: Large coupled magnetoresponses in EuNbO2N.
abstract: We have explored a new strategy to discover materials with large resistive or capacitive responses to magnetic fields by synthesizing EuMO2N (M = Nb, Ta) perovskites that combine ferromagnetic order of S = 7/2 Eu2+ spins with possible off-center distortions of the d0 M5+ cations enhanced by covalent bonding to N. EuNbO2N shows colossal magnetoresistances at low temperatures and a giant magnetocapacitance. However, the latter response originates from a microstructural effect rather than an intrinsic multiferroism.
authors.affiliation: Institut de Ciència de Materials de Barcelona (C.S.I.C.), Campus U.A.B., 08193 Bellaterra, Spain.
authors.forename: A Belén
authors.initials: AB
authors.lastname: Jorge
authors.forename: Judith
authors.initials: J
authors.lastname: Oró-Solé
authors.forename: Ana M
authors.initials: AM
authors.lastname: Bea
authors.forename: Nandang
authors.initials: N
authors.lastname: Mufti
authors.forename: Thomas T M
authors.initials: TT
authors.lastname: Palstra
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Rodgers
authors.forename: J Paul
authors.initials: JP
authors.lastname: Attfield
authors.forename: Amparo
authors.initials: A
authors.lastname: Fuertes