From conventional to inverse magnetocaloric effect in GdMn_1-xCr_xO₃

Figures & data

Figure 1. The dependence of isofield magnetization vs. temperature.

Figure 2. Magnetization vs. temperature for GMCO samples in H_exe of 0.05 T. The dashed curves are modelled results and symbols represent experimental data from Ref. 42.

Table 1. The PM parameters for GMCO at H_exe= 0.05 T.

Level of doping (x)	Type of MCE	Mi (emu/g)	Mf (emu/g)	TMPT (K)	$\beta$ (emu/g.K)	$\alpha$ (emu/g.K)
0.1	conventional	20	0.7	11	−0.004	−1.33
0.2	conventional	15.9	0.6	11	−0.006	−0.9
0.3	conventional	2.8	0.6	9.5	−0.012	−0.24
0.4	inverse	−5.8	0.9	16	0.02	0.33
0.4	conventional	1.1	0.3	59.2	0.02	−0.023

Figure 3. ΔS_M vs. temperature for GMCO samples in ΔH of 0.05 T.

Table 2. The predicted values of MC properties for GMCO under ΔH of 0.05 T.

Level of doping (x)	TMPT (K)	|ΔSMax| (J/Kg.K)	δTFWHM (K)	RCP (J/Kg)	ΔCP,H(Max) (J/Kg.K)	RC (J/Kg)
0.1	11	0.067	16.7	1.11	0.11	0.79
0.2	11	0.045	19.7	0.89	0.07	0.63
0.3	9.5	0.012	11.3	0.14	0.02	0.10
0.4	16, 59.2	0.017	25.5	0.42	0.01	0.30

Figure 4. ΔC_P,H vs. temperature for GMCO samples in ΔH of 0.05 T.

Table 3. The values of MC properties for GMCO and other MC materials.

Composition	ΔH (T)	TMPT (K)	|ΔSMax| (J/Kg.K)	δTFWHM (K)	RCP (J/Kg)	ΔCP,H(Max) (J/Kg.K)	Ref.
GMCO	0.05	11-59.2	0.017-0.067	11.3-25.5	0.14-1.11	0.01-0.11	This work
La1-xCdxMnO3	0.05	198–240	0.011	29.65—44.03	0.326— 0.484	0.087—0.105	[46]
Zn0.6Ni0.4Fe2O4	1.7	435.8-559	0.025	–	–	–	[47]
Ni2 + xMn1−xGe	0.05	150–239	0.019—0.02	33	0.63—0.68	0.12—0.21	[48]
(001)-oriented MnAs films	0.03	222–263	0.01-0.02	55.47—75.50	0.07—1.22	0.07-0.083	[49]
Gd1−xCaxBaCo2O5.5	0.1	273–295	1.65E-6—2.2 E-6	9.77—13.85	1.61 E-5 – 3.04 E-5	6.14 E-5  – 6.34E-5	[50]
La1.25Sr0.75MnCoO6	0.5	200–205	0.0175	26—124	0.45, 2.18	0.04-0.19	[51]
BiFe1−xZnxO3	1	628–631	0.005- 0.006	4.9-6.9	0.27-0.40	0.022-0.038	[52]
NdMnO3	1	8–12	3.7 E-3	6.8	0.025	–	[53]
Ge0.95Mn0.05 Films	0.1	85–120	4E-7—3.6 E-6	12.69—17.75	6.3 E-6 – 0.451 E-5	7.7 E-6—1.1 E-4	[54]
BiFe1−xZnxO3	1	629–631	5E-3- 6 E-3	5–7	0.27-0.40	2.2 E-2—3.8 E-2	[55]
Ni58Fe26Ga28	0.2—0.5	263–283	0.005—0.013	42—73	0.19—0.94	0.04—0.07	[56]
Gd single crystal	1	293	0.37	–	–	–	[57]

Hamad MA. Magnetocaloric effect in La1−x Cd x MnO3. J.Supercond.Nov.Magn. 2013;26:3459.

 Web of Science ®Google Scholar

Hemeda OM, Mostafa NY, Abd Elkader OH, et al. Electrical and morphological properties of magnetocaloric nano ZnNi ferrite. J.Magn.Magn.Mater. 2015;394:96–104.

 Web of Science ®Google Scholar

El-Sayed AH, Hamad MA. Nickle concentration effect on low magnetic field magnetocaloric properties for Ni2+xMn1−xGe. J.Supercond.Nov.Magn. 2019;31:1447.

 Google Scholar

Hamad MA. Magnetocaloric effect in (001)-Oriented MnAs thin film. J.Supercond.Nov.Magn. 2014;27:263.

 Web of Science ®Google Scholar

Hamad MA. Magnetocaloric effect in polycrystalline Gd1−xCaxBaCo2O5.5. Materials Lett. 2012;82:181.

 Web of Science ®Google Scholar

Hamad MA. Magnetocaloric effect in La1.25Sr0.75MnCoO6. J.Therm.Anal.Calorim. 2014;115:523.

 Web of Science ®Google Scholar

Amirov AA, Makoed II, Chaudhari YA, et al. Magnetocaloric effect in BiFe1−xZnxO3 multiferroics. J.Supercond.Nov.Magn. 2018;31:3283.

 Web of Science ®Google Scholar

Masrour R, Jabar A, Benyoussef A, et al. Monte Carlo simulation study of magnetocaloric effect in NdMnO 3 perovskite. J.Magn.Magn.Mater. 2016;401:91–95.

 Web of Science ®Google Scholar

Hamad MA. Magneto-caloric effect in Ge0.95Mn0.05 Films. J.Supercond.Nov.Magn. 2013;26:449.

 Web of Science ®Google Scholar

Amirov AA, Makoed II, Chaudhari YA, et al. Magnetocaloric effect in BiFe1−xZnxO3 multiferroics. J.Supercond.Nov.Magn. 2018;31:3283.

 Web of Science ®Google Scholar

El-Sayed AH, Hamad MA. Phenomenological modeling of magnetocaloric effect for Ni58Fe26Ga28 Alloy. J.Supercond.Nov.Magn. 2018;31:1895.

 Web of Science ®Google Scholar

Ba DN, Zheng Y, Becerra L. Magnetocaloric effect in flexible, free-standing gadolinium thick films for energy conversion applications. Phys Rev Appl. 2021;15:064045.

 Web of Science ®Google Scholar