Review of magnetocaloric properties in lanthanum manganites

Rare‐Earth‐Free Mn30Fe20−xCuxAl50 Magnetocaloric Materials with Stable Cubic CsCl‐Type Structure for Room‐Temperature Refrigeration

“…a) Δ H dependence of TEC (10K), −Δ S M max , RCP, and RC of the Mn 30 Fe 12 Cu 8 Al 50 alloy; b) Δ S M ( T ) curves of Mn 30 Fe 20− x Cu x Al 50 alloys under and Δ H of 0–2 and 0–7 T; and c) the −Δ S M max for Mn 30 Fe 20− x Cu x Al 50 alloys and reported room‐temperature magnetocaloric materials. [ 1–3,42–49 ] …”

“…These values were comparable to those of the RE 1-x A x MnO 3 -based MCMs and their substituted variants, and also better than those of recently reported RE-free magnetocaloric materials with SO-MPT, such as, the Iron-based, Cobaltbased, Manganese-based alloys or compounds as well as the all transition metal-based high-entropy alloys. [1][2][3][42][43][44][45][46][47][48][49] However, they are still obviously smaller than those of pure Gd as well as Gd 5 (Si,Ge) 4 -based and La(Fe,Si) 13 -based giant magnetocaloric materials. [1][2][3] We here should state that it is impossible to achieve such high magnetocaloric performance for 3d transition metalbased MCMs with SO-MPT as the RE-based MCMs, due to fact of much lower magnetic moments of 3D transition metal than those of RE elementals.…”

Influence of powder feedstock characteristics on extrusion-based 3D printing of magnetocaloric structures

“…As a starting point, it is worthwhile to note that instead of Ni-Mn-Ga Heuslers and La(Fe,Si) 13 -based alloys that demonstrate promising magnetocaloric response in the range of (3.5 to 15.1 J/kgK and 4 to 30 J/kgK at 2 T) [27,28], the candidate materials system for this study is calcium-substituted lanthanum manganite-a chemically stable perovskite oxide that shows a moderate delta S value of 1.38 to 5.5 J/kgK at 1.5 T [29,30]. Relative to intermetallic magnetocaloric materials, the ease of synthesis of LCMO is unparalleled, and over the last few decades, several chemical methods have been used to obtain substituted lanthanum manganites: solid state method, sol-gel, chemical homogenization method, ball milling, flux method, heteronuclear complexing, and microwave heating [31].…”

The magnetocaloric effect properties for potential applications of magnetic refrigerator technology: a review

“…Many researchers have reported two types of magnetic phase transition orders based on the results of these curves. 1,4,7,16,17,41,47,48,52–57 If the first derivative results in a discontinuous curve marked by a magnetic phase transition at critical points within a very narrow temperature range, such as changes in entropy, volume, and magnetization values, it is known as the behavior of a first-order magnetic phase transition (FOMT). 54,55,57 This phenomenon often occurs when the magnetic transition (dis)order–order occurs parallel to changes in the underlying crystal lattice, which is associated with magnetostructural transformations accompanied by the emergence of hysteresis.…”