Room temperature large magnetoresistance and magnetocaloric properties of La0.78Ag0.22MnO3 film

Magnetocaloric materials: From micro- to nanoscale

“…They remark the major impact of size-reduction: the broadening of the magnetic transition and the reduction of the T C , magnetic moment, and DS max associated with a weakening of the magnetic transition first-order nature. 140 Wang et al 141 in 2002 were one of the first to study the MCE of a laser pulsed deposited La 0.78 Ag 0.22 MnO 3 thin film, reporting DS max ; À2.22 J/(kg K) at room temperature under DH 5 10 kOe (Fig. 10).…”

Magnetic entropy change in polycrystalline La1−xKxMnO3 perovskites

“…Magnetic entropy change on divalent alkaline-earth-doped lanthanide manganites with various compositions have been reported widely [3,4,12,[16][17][18][19][20][21][22][23][24][25][26][27][28]. However, investigations on monovalent alkali-metal-doped manganites are relatively few [7,29,30]. In the present communication, we report our recent results on the magnetocaloric effect in good quality La 1−x K x MnO 3 (x = 0.05, 0.10, 0.15), prepared by pyrophoric technique and having their T C ranging between 260 and 309 K. It is found that these materials display significant magnetic entropy changes induced by low magnetic field changes.…”

Magnetocaloric effect and improved relative cooling power in (La0.7Sr0.3MnO3/SrRuO3) superlattices

“…Similar strong decrease in total entropy changes and RCP values are also found in MnAs monolayer film [6], which also involves a magneto-structural coupling around the first-order paramagnetic-ferromagnetic transition. Other investigations on monolayer films, like La 0.78 Ag 0.22 MnO 3 [8], La 0.67 A 0.33 MnO 3 (A = Ca, Sr, or Ba) [9] or Gd 1−x W x [10], also lead to reduced isothermal entropy changes and RCP values. Thus, it is interesting to study the MCE in multilayers or superlattices, especially consisting of materials with second-order transitions, i.e.…”