Abstract
Abstract
Field-induced metamagnetic behavior and orbital-ordering (OO) in Yb-substituted (PrSr)MnO3 perovskites have been reported. The occurrence of distortions in the tetragonal crystal lattice leads to a reduction in the
Mn
−
O
2
−
Mn
bond angle, which in turn governs the temperature and field-dependent long-range magnetic orderings. Extensive magnetization measurements reveal the high Curie temperature
T
C
∼ 302 K ferromagnetic (FM) phase and suggest the possibility of the existence of the OO in Pr0.45–x
Yb
x
Sr0.55MnO3 accompanied by antiferromagnetic (AFM) Néel temperature,
T
N
, as low as 158 K. Irreversible metamagnetic transitions from the AFM phase to the FM phase occur for a specific composition x = 0.05 (Yb5) until
T
⩽ 220 K. The admixture of AFM and FM metastable states is quite robust in the investigated system, whereas the AFM state is mediated by Yb3+ ions, while the FM state arises as a result of field-driven thermo-magnetic kinetics. These results provide a constructive approach for designing novel spin-valve devices.
Funder
Central Instrument Facility (CIF) of the Indian Institute of Technology Guwahati
SERB of Department of Science and Technology, India
Council of Scientific and Industrial Research (CSIR), India
DST SERB Core Research Grant
Subject
Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials