Magnetic properties of NdMn_1-xFe_xO_3+δ system

¹ Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovak Republic
² Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
³ P. J. Šafárik University, Moyzesova 11, 041 54 Košice, Slovak Republic

Abstract

Magnetization, AC susceptibility and specific heat measurements were performed on polycrystalline NdMn_1-xFe_xO_3+δ compounds (x = 0.0, 0.1 and 0.2). Substitution of Fe for Mn reduces the Néel temperature T_N, which is associated with magnetic ordering of Mn sublattice, from 85.5 K to 57.0 K. The temperature dependence of magnetization for x = 0.2 exhibits the compensation temperature and the pole inversion below T_comp = 26.7(5) K. Initial magnetization curves present a remnant magnetization in the ordered region with the sign of remnant magnetization depending on temperature. The substitution of Fe for Mn changes hysteresis loop of NdMnO_3+δ from the ferromagnetic-like one (μ₀H_c = 0.09 T) by expanding the width of the loop (μ₀H_c = 0.55 T) for x = 0.1 and then shrinking the central part of the loop to “butterfly” type (μ₀H_c = 0.35 T) for x = 0.2.