Magnetic entropy change in perovskite manganites La0.65Nd0.05Ca0.3Mn0.9B0.1O3 (B=Mn, Cr, Fe)

Magnetocaloric effect above room temperature in the ordered double-perovskite Ba2Fe1+xMo1−xO6

“…Meanwhile, the hole-doped ABO 3 -type perovskite manganites perovskites [27,28] have also been found to generate large magnetic entropy change under a moderate magnetic field. In our recent systematic investigations carried out on magnetocaloric properties of perovskite materials, we have found many significant results [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Very recently, the basic research in the electronic and magnetic properties of the perovskite-type compounds of the type ABO 3 has been extended to compounds with ordered double-perovskite structure A 2 B 0 B 00 O 6 , in particular because magnetically ordered Sr 2 FeMoO 6 has shown a low-field colossal magnetoresistance remaining significant up to room temperature [29].…”

Magnetocaloric properties of Cd-substituted perovskite-type manganese oxides

“…The double-exchange interaction between Mn 3+ and Mn 4+ is usually considered to be responsible for the observed magnetic entropy change in perovskite manganites [19][20][21][22]. Another contribution to the large magnetic entropy change is believed to be related to the considerable variation of magnetization near T C [23].…”

Electrical transport and magnetic properties of La0.67Ca0.33Mn1−x Cr x O3 and La0.67+x Ca0.33−x Mn1−x Cr x O3(0.04≤x≤0.08)

“…Some groups [10] conclude that DE is responsible for the FM interaction between Cr and Mn in LaMn 1-x Cr x O 3 . However, in the opinion of other authors [12,13] …”

“…Since Cr 3+ has the same electronic configuration t 2g 3 as Mn 4+ , this feature makes Cr 3+ an interesting ion to study for the possible existence of DE between Cr 3+ and Mn 3+ . More recently, several groups have made systematic investigations in Cr-doped La 0.67 Ca 0.33 MnO 3 (LCMO) [9][10][11][12][13] . Their results have not come to terms with the nature of the ferromagnetic (FM) Mn 3+ -O-Cr 3+ interaction.…”