Magnetocaloric effect in  Sr2CrIrO6  double perovskite: Monte Carlo simulation

Rhazouani, O. El; Slassi, Amine; Ziat, Younes; Benyoussef, A.

doi:10.1016/j.jpcs.2016.12.033

Cited by 27 publications

(8 citation statements)

References 26 publications

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“…We have to mention that the temperature corresponding to the maximum is near the critical temperature. This is consistent with that shown in [14,37,40], which present that the maximum of the −ΔS appears in the vicinity of the critical temperature. Thus, the prominent increase in the variation of −ΔS results from the heat that the system releases during the phase transition.…”

Section: Magnetization and Susceptibilitysupporting

confidence: 93%

“…The influence of the crystal field and external magnetic field on the variation of the peak value of isothermal entropy change was discussed emphatically. Apart from the research mentioned above, there are many other investigations on the MCE of thin films, for instance AlCMn 3 [36], NdMnO 3 [37], Ho 3 Pd 2 [38], Sr 2 CrMoO 6 [39], Sr 2 CrIrO 6 [40], and SmFe 1−x Mn x O 3 [41]. All these studies reveal that exchange coupling and an applied external field play a significant role in the variation of the MCE, and this is exactly what our present research focuses on.…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Chang¹,

Wang²,

Ma³

et al. 2021

Commun. Theor. Phys.

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The magnetic properties and magnetocaloric effect of an antiferromagnetic/ferromagnetic (AFM/FM) BiFeO3/Co bilayer with mixed-spin (5/2, 3/2) have been studied based on Monte Carlo simulation. The magnetization, susceptibility, and critical temperature are investigated under various exchange couplings and an external magnetic field. In particular, the influence of exchange couplings and an external magnetic field on the magnetic entropy change, adiabatic temperature change, and the relative cooling power (RCP) are studied. The simulation results indicated that the decrease of the exchange coupling and the increase of external magnetic fields can cause an increase of magnetic entropy change, adiabatic temperature change, and RCP. In addition, the hysteresis loops of the system are presented for different exchange couplings and temperatures.

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Section: Magnetization and Susceptibilitysupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Chang¹,

Wang²,

Ma³

et al. 2021

Commun. Theor. Phys.

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“…Double perovskites R 2 BB′O 6 (R is a rare-earth ion; B and B′ are transition metals) are important materials today because of their rich physical properties and technological application. − Multifunctional properties of these structures include colossal magnetoresistance, magnetocapacitance, and multiferroicity. Spin phonon coupling gives rise to such exotic properties in R 2 BB′O 6 compounds.…”

Section: Introductionmentioning

confidence: 99%

“…Spin phonon coupling gives rise to such exotic properties in R 2 BB′O 6 compounds. Such coupling strongly depends on the R and B/B′-site ordering. − …”

Section: Introductionmentioning

confidence: 99%

Role of Antisite Disorder, Rare-Earth Size, and Superexchange Angle on Band Gap, Curie Temperature, and Magnetization of R₂NiMnO₆ Double Perovskites

Nasir¹,

Kumar²,

Patra

et al. 2019

ACS Appl. Electron. Mater.

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Homogeneous solid solutions of sol−gel-prepared R 2 NiMnO 6 (R = La, Pr, Nd, Sm, Gd, Tb, Dy, Y, and Ho) double perovskites crystallize in a B-site-ordered monoclinic structure (P2 1 /n space group). Monoclinic distortion enhances with decreasing R 3+ ionic radii (r R 3+ ). The magnetic ordering temperature (T C ) decreases from 270 K for La 2 NiMnO 6 to 80 K for Ho 2 NiMnO 6 as r R 3+ decreases from 1.16 Å (La 3+ ) to 1.02 Å (Ho 3+ ). An additional magnetic anomaly is observed in Nd 2 NiMnO 6 , Sm 2 NiMnO 6 , Tb 2 NiMnO 6 , and Dy 2 NiMnO 6 at lower temperatures, which originates from the 3d−4f coupling between Mn−Ni and Nd 3+ /Sm 3+ /Tb 3+ /Dy 3+ magnetic moments. Further, high saturation magnetization is achieved for all samples, indicating that they are atomically ordered and have less antisite disorders. Upon a decrease in the size of R 3+ , the local structure shows an expansion of NiO 6 octahedra and almost unchanged of MnO 6 octahedra. X-ray-absorption near-edge spectroscopy reveals a majority of Ni 2+ and Mn 4+ ions in all samples. Softening of phonon modes results in the elongation of the Ni/Mn−O bond length. Finally, a correlation among lattice parameters, structural distortion, octahedral tilting, superexchange angle, electronic band gap, Curie temperature, and the rare-earth ionic radius is established.

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“…All such properties in R 2 BB 0 O 6 (R ¼ rare-earth ion) compounds result from spin-phonon coupling, which strongly depends on the R and B/B 0 -site ordering. [6][7][8][9][10] The degree of the B-site ordering determines the crystal structure and magnetic exchange interactions between the respective magnetic B-cations. Generally, the B-site ordering can be controlled by steric (cation sizes) and Coulomb interactions (oxidation states) between the chosen B/B 0 cations, which can be…”

mentioning

confidence: 99%

Studies of Structural, Electrical, and Magnetic Characteristics of Double Perovskite Ceramic: La₂FeMnO₆

Das

Alagarsamy

Choudhary

2021

Physica Status Solidi (b)

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Herein, detailed studies of structural, electrical, and magnetic characteristics of a double perovskite lanthanum iron manganate (La2FeMnO6) are reported. From the Rietveld analysis of X‐ray diffraction data and pattern, the orthorhombic structure of the compound is determined. The least‐squares refined lattice parameters of the compound are: a = 5.5370 Å, b = 7.7988 Å, and c = 5.5069 Å. The frequency–temperature dependence of the dielectric parameters is explained by the Maxwell–Wagner model to provide the polarization mechanism. Analysis of temperature dependence of impedance and modulus data of different frequency has shown the contributions of grains and grain boundaries in the electrical characteristics of the material. This analysis also shows the semiconductor characteristics, through a negative temperature coefficient of resistance nature. Based on both impedance and modulus spectroscopy, the dielectric relaxation process is found to be of a non‐Debye type. The study of scaling behavior of impedance and modulus data suggests that relaxation phenomena are nearly independent of temperature. Detailed analysis of the frequency dependence of conductivity data of different temperatures using the Jonscher's power law has shown the existence of different types of conduction mechanisms in the material. The nature of the current–voltage (I–V) curves suggests that the material behaves as a semiconductor diode type to be used for the rectifying purpose. The conduction mechanism follows the space charge‐limited conduction (SCLC) process which is obtained from leakage current analysis. The study of magnetic hysteresis of the material suggests that the material exhibits soft ferromagnetic ordering.

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Magnetocaloric effect in Sr2CrIrO6 double perovskite: Monte Carlo simulation

Cited by 27 publications

References 26 publications

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Role of Antisite Disorder, Rare-Earth Size, and Superexchange Angle on Band Gap, Curie Temperature, and Magnetization of R₂NiMnO₆ Double Perovskites

Studies of Structural, Electrical, and Magnetic Characteristics of Double Perovskite Ceramic: La₂FeMnO₆

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Magnetocaloric effect in Sr2CrIrO6 double perovskite: Monte Carlo simulation

Cited by 27 publications

References 26 publications

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO3/Co bilayer

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO3/Co bilayer

Role of Antisite Disorder, Rare-Earth Size, and Superexchange Angle on Band Gap, Curie Temperature, and Magnetization of R2NiMnO6 Double Perovskites

Studies of Structural, Electrical, and Magnetic Characteristics of Double Perovskite Ceramic: La2FeMnO6

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Product

Resources

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Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Monte Carlo study of the magnetic properties and magnetocaloric effect of an AFM/FM BiFeO₃/Co bilayer

Role of Antisite Disorder, Rare-Earth Size, and Superexchange Angle on Band Gap, Curie Temperature, and Magnetization of R₂NiMnO₆ Double Perovskites

Studies of Structural, Electrical, and Magnetic Characteristics of Double Perovskite Ceramic: La₂FeMnO₆