Large coupled magnetoresponses in EuNbO2N.
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.
Jorge
A Belén
AB
Institut de Ciència de Materials de Barcelona (C.S.I.C.), Campus U.A.B., 08193 Bellaterra, Spain.
Oró-Solé
Judith
J
Bea
Ana M
AM
Mufti
Nandang
N
Palstra
Thomas T M
TT
Rodgers
Jennifer A
JA
Attfield
J Paul
JP
Fuertes
Amparo
A