Consequences of R3+ cationic radii on the dielectric and magnetic behavior of RCrO3 perovskites

Singh, Kapil Dev; Singh, Fouran; Choudhary, R. J.; Kumar, Ravi

doi:10.1007/s00339-020-3324-z

Cited by 15 publications

(4 citation statements)

References 50 publications

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“…Neutron diffraction measurements showed that the Cr 3+ ions order antiferromagnetically in the G-type magnetic configurations with weak ferromagnetic (WFM) component Γ 1 A x , G y , C z , Γ 2 F x , G z , C y , Γ 4 F z , A y , G x . Magnetic ordering temperatures of Cr 3+ and R 3+ -sublattices are different, the Neel temperature of the Cr 3+ sublattice is about T N Cr ∼ 110-280 K (for comparison, in orthoferrites T N Fe = 620-740 K), the Neel temperature of the R 3+ sublattice being around of the several K (T Dy/Tb N ∼ 3.8/5 K, T Sm/Nd/Er N ∼ 34/17/6 K) is much lower [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 96%

“…Sm Nd Er N TK . Spins of the rare earth ions can order and reorient due to the influence of the internal effective field of the Cr 3+ magnetic sublattice and external factors such as applied magnetic field and strains [13][14][15]. These local transitions give an impact in the spin reorientation processes and lead to exotic magnetization reversals [13, 16 -19] Though ferroelectricity in RCrO3 is forbidden by symmetry ferroelectric behavior have been observed in the number of orthochromites above the antiferromagnetic ordering temperature TN [8].…”

Section: Introductionmentioning

confidence: 99%

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Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Zvezdin

Gareeva

Chen

2021

J. Phys.: Condens. Matter

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In this paper, we present a symmetry analysis of magnetoelectric properties and spin reorientation processes in rare earth orthochromites, RCrO3. Structural instability and related crystallographic distortions in these materials lead to polar and axial structural modes emerging due to electric dipole ordering and rotations of the O6 octahedra. We find that displacements of oxygen ions from their highly symmetric positions in the parent perovskite phase induce electric dipole moments near Cr 3+ ions arranged in the antiferroelectic mode. Our results indicate that, in essence, RCrO3 are ferroelectric materials, the polarization of which manifests itself in electric field. These findings are supported by recent experiments demonstrating electric field induced polar ordering in RCrO3 crystals with various rare earth ions. Here, we classify structural order parameters according to the irreducible representations of the RCrO3 symmetry group (D2h 16 ), determine the possible couplings between distortive, ferroelectric and magnetic orderings and discuss a series of magnetoelectric structures in these terms. The presented analysis allows explain experiments on polarization reversal and the concomitant reorientation of spins, as well as to predict possible scenarios of phase transitions in RCrO3.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Zvezdin

Gareeva

Chen

2021

J. Phys.: Condens. Matter

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“…In contrast to BiFeO 3 , the ferroelectric properties of RCrO 3 are weak, and the Curie ordering temperatures are low (T C ~130-250 K) [55,56]. However, as recent experiments have shown, during the polishing of samples in an electric field, an electric polarization of the order of 0.06 µC/cm 2 is induced; moreover, the electric field affects the spin-reorientation phase transitions, which indicates the presence of magnetoelectric coupling in the material [57,58].…”

Section: Magnetoelectric Properties Of Rcromentioning

confidence: 99%

Symmetry Analysis of Magnetoelectric Effects in Perovskite-Based Multiferroics

Gareeva

Zvezdin

et al. 2022

Materials

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In this article, we performed symmetry analysis of perovskite-based multiferroics: bismuth ferrite (BiFeO3)-like, orthochromites (RCrO3), and Ruddlesden–Popper perovskites (Ca3Mn2O7-like), being the typical representatives of multiferroics of the trigonal, orthorhombic, and tetragonal crystal families, and we explored the effect of crystallographic distortions on magnetoelectric properties. We determined the principal order parameters for each of the considered structures and obtained their invariant combinations consistent with the particular symmetry. This approach allowed us to analyze the features of the magnetoelectric effect observed during structural phase transitions in BixR1−xFeO3 compounds and to show that the rare-earth sublattice has an impact on the linear magnetoelectric effect allowed by the symmetry of the new structure. It was shown that the magnetoelectric properties of orthochromites are attributed to the couplings between the magnetic and electric dipole moments arising near Cr3+ ions due to distortions linked with rotations and deformations of the CrO6 octahedra. For the first time, such a symmetry consideration was implemented in the analysis of the Ruddlesden–Popper structures, which demonstrates the possibility of realizing the magnetoelectric effect in the Ruddlesden–Popper phases containing magnetically active cations, and allows the estimation of the conditions required for its optimization.

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“…The antiferromagnetic ordering temperature due to Cr 3+ -Cr 3+ is greatly influenced by the ionic radius of rare-earth materials. It has been shown that the Neel temperature for RCrO 3 increases with the rise in the ionic radius of the R site cation [14].…”

Section: Introductionmentioning

confidence: 99%

Integrated study of the structural and magnetic characteristics of Nd(Mn, Cr)_0.5O₃: exploring perovskite material

Altowairqi,

Shariq,

Alasmari

et al. 2024

Phys. Scr.

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In this work, a perovskite material, Nd(Mn,Cr)0.5O3, is synthesized by a sol-gel chemical route method, and the structural and magnetic properties of the prepared samples were studied for a range of annealing temperatures. The variation of structural parameters against annealing temperatures is analyzed via Rietveld refinement, and it exhibits orthorhombic cubic geometry with non-monotonically increasing lattice parameters. lattice strain is due to canting in the Cr3+ and Mn3+ ions and the presence of strain is also confirmed by the shifting of XRD peaks towards a higher 2θ angle. The obtained Goldschmidt tolerance factor is 0.87, which confirms the stability of the perovskite structure. The magnetic properties of the prepared samples show the ferromagnetic transition temperature ranging from 86.5 K to 82.2 K due to super-exchange interaction between Cr3+ and Mn3+ ions via oxygen ions. The stability in crystal structure, lower value of strain, and ferromagnetic nature at low temperature for the samples annealed up to1000 C may make this material applicable for magnetic data storage.

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Consequences of R3+ cationic radii on the dielectric and magnetic behavior of RCrO3 perovskites

Cited by 15 publications

References 50 publications

Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Symmetry Analysis of Magnetoelectric Effects in Perovskite-Based Multiferroics

Integrated study of the structural and magnetic characteristics of Nd(Mn, Cr)_0.5O₃: exploring perovskite material

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Consequences of R3+ cationic radii on the dielectric and magnetic behavior of RCrO3 perovskites

Cited by 15 publications

References 50 publications

Multiferroic order parameters in rhombic antiferromagnets RCrO3

Multiferroic order parameters in rhombic antiferromagnets RCrO3

Symmetry Analysis of Magnetoelectric Effects in Perovskite-Based Multiferroics

Integrated study of the structural and magnetic characteristics of Nd(Mn, Cr)0.5O3: exploring perovskite material

Contact Info

Product

Resources

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Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Multiferroic order parameters in rhombic antiferromagnets RCrO₃

Integrated study of the structural and magnetic characteristics of Nd(Mn, Cr)_0.5O₃: exploring perovskite material