Effect of Cu doping and oxygen-annealing on the magnetic properties of Nd0.5Sr0.5Mn1−xCuxO3−δ (x = 0.0, 0.01, 0.03, 0.05 and 0.10)

Influence of non-magnetic and magnetic ions on the MagnetoCaloric properties of La0.7Sr0.3Mn0.9M0.1O3 doped in the Mn sites by M=Cr, Sn, Ti

“…On the other hand, the oxygen deficiency could play an important role in the physical properties of this kind of materials, especially the structural transition that may appear in the magnetic, MCE and electrical properties [45,46].…”

Short-range magnetic behavior in manganites La0.93K0.07Mn1- x Cu x O3 (0.0 ⩽ x ⩽ 0.09) above the Curie temperature

“…Some of these doped manganites show short-range local FM structures above T C [9,10], analogous to the randomly diluted Ising ferromagnets described by [11]. Specifically, Cu doping at B sites [12][13][14][15][16] are of special interest because besides structurally altering the lattice (changes in the length of the Mn-O bonds and the Mn-O-Mn angles), they also alter the composition of magnetic chains. In general, two types of magnetic interactions are identified in these materials: the ferromagnetic interaction [17], due to the double exchange interaction (Mn 3+ -O-Mn 4+ ) and the antiferromagnetic interaction [13,18], originated in super exchange (Mn 3+ -O-Mn 3+ or Mn 4+ -O-Mn 4+ ).…”

“…Specifically, Cu doping at B sites [12][13][14][15][16] are of special interest because besides structurally altering the lattice (changes in the length of the Mn-O bonds and the Mn-O-Mn angles), they also alter the composition of magnetic chains. In general, two types of magnetic interactions are identified in these materials: the ferromagnetic interaction [17], due to the double exchange interaction (Mn 3+ -O-Mn 4+ ) and the antiferromagnetic interaction [13,18], originated in super exchange (Mn 3+ -O-Mn 3+ or Mn 4+ -O-Mn 4+ ). The objective of this work was to investigate the short-range FM behavior present in the perovskite La 0.93 K 0.07 Mn 1−x Cu x O 3 in the 0.0 < x < 0.1 range.…”