Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1-xMnO6

2021 ◽  
pp. 161624
Author(s):  
Richa Pokharel Madhogaria ◽  
Nicholas S. Bingham ◽  
Raja Das ◽  
Manh-Huong Phan ◽  
Hariharan Srikanth
Keyword(s):  
Phase Diagrams ◽  
Double Perovskite ◽  
Magnetic Interactions

scholarly journals Electric polarization from spiral order below 200K in multiferroic YBaCuFeO5

2014 ◽  
Vol 70 (a1) ◽  
pp. C388-C388
Author(s):  
Mickael Morin ◽  
Denis Scheptyakov ◽  
Lukas Keller ◽  
Juan Rodríguez-Carvajal ◽  
Andrea Scaramucci ◽  
...  
Keyword(s):  
Magnetic Order ◽  
Magnetic Moments ◽  
Double Perovskite ◽  
Electric Polarization ◽  
Ferroelectric Materials ◽  
Point Of View ◽  
Spin Reorientation ◽  
Magnetic Interactions ◽  
Practical Applications ◽  
Spiral Model

Ferroelectric materials have been known for almost one century [1]. While their potential for applications was rapidly recognized, the possibility of combining ferroelectricity with magnetic order -preferably with ferromagnetism- has resulted in an enormous deal of interest during the last decade. Several new materials combining both types of order have been recently reported, although their promising multifunctionalities have been obscured by two facts: on one side, most of them are antiferromagnetic; on the other, their transition temperatures, typically below 40K, are too low for most practical applications. The oxygen-defficient double perovskite YBaFeCuO5 constitutes a remarkable exception. Spontaneous electric polarization has been recently reported to exist below an unusually high temperature of TC ≍ 200K [2] coinciding with the occurrence of a commensurate - to - incommensurate reorientation of the Fe3+ and Cu2+ magnetic moments [3,4]. From a more fundamental point of view the observation of incommensurable magnetic order in a tetragonal material at such high temperatures is rather surprising. In particular, the nature of the relevant competing magnetic interactions and its possible link to low dimensionality or geometrical frustration is not understood at present. Although the existence of the spin reorientation in this material is known since 1995 [3] the low temperature magnetic structure has not yet been solved. Using neutron powder diffraction we have recently been able to propose a spiral model which satisfactorily describes the measured magnetic intensities below TC. Further, investigation of the crystal structure showed the existence of small anomalies in the lattice parameters and some interatomic distances at TC. The relevance of these findings for the magnetoelectric coupling, the direction of the polarization, the modification of the different exchange paths in the structure and the stabilization of the incommensurate magnetic order below TC is discussed.

Superconductivity and Magnetic Order: Low Temperature Phase Diagrams

1982 ◽  
Vol 19 ◽  
Author(s):  
M. Brian Maple
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Phase Diagrams ◽  
Critical Magnetic Field ◽  
Magnetic Interactions ◽  
Antiferromagnetic Order ◽  
Temperature Phase ◽  
Field Versus ◽  
Ferromagnetic Interactions ◽  
Low Temperature Phase

ABSTRACTRecent experiments on magnetically-ordered ternary and pseudoternary rare earth superconductors are briefly reviewed. Superconductivity has been found to coexist with antiferromagnetic order, but to be destroyed by the onset of ferromagnetic order at a second transition temperature Tc2∼TM, where TM is the Curie temperature. In antiferromagnetic superconductors, the antiferromagnetic order modifies superconducting properties such as the curve of the upper critical magnetic field versus temperature. In ferromagnetic superconductors, a long wavelength (∼ 102 Å sinusoidally modulated magnetic state develops in the superconducting state as a result of the superconducting-ferromagnetic interactions. The interplay of superconductivity and competing magnetic interactions in pseudoternary rare earth systems produces complex and interesting low temperature phase diagrams.

scholarly journals Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba$$_{2}$$MnTeO$$_{6}$$

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. Khatua ◽  
T. Arh ◽  
Shashi B. Mishra ◽  
H. Luetkens ◽  
A. Zorko ◽  
...  
Keyword(s):  
Triangular Lattice ◽  
Degrees Of Freedom ◽  
Spin Dynamics ◽  
Muon Spin ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Double Perovskite ◽  
Magnetic Interactions ◽  
Spin Frustration ◽  
Ordered State

AbstractFrustrated magnets based on oxide double perovskites offer a viable ground wherein competing magnetic interactions, macroscopic ground state degeneracy and complex interplay between emergent degrees of freedom can lead to correlated quantum phenomena with exotic excitations highly relevant for potential technological applications. By local-probe muon spin relaxation ($$\mu$$ μ SR) and complementary thermodynamic measurements accompanied by first-principles calculations, we here demonstrate novel electronic structure and magnetic phases of Ba$$_{2}$$ 2 MnTeO$$_{6}$$ 6 , where Mn$$^{2+}$$ 2 + ions with S = 5/2 spins constitute a perfect triangular lattice. Magnetization results evidence the presence of strong antiferromagnetic interactions between Mn$$^{2+}$$ 2 + spins and a phase transition at $$T_{N}$$ T N = 20 K. Below $$T_{N}$$ T N , the specific heat data show antiferromagnetic magnon excitations with a gap of 1.4 K, which is due to magnetic anisotropy. $$\mu$$ μ SR reveals the presence of static internal fields in the ordered state and short-range spin correlations high above $$T_{N}$$ T N . It further unveils critical slowing-down of spin dynamics at $$T_{N}$$ T N and the persistence of spin dynamics even in the magnetically ordered state. Theoretical studies infer that Heisenberg interactions govern the inter- and intra-layer spin-frustration in this compound. Our results establish that the combined effect of a weak third-nearest-neighbour ferromagnetic inter-layer interaction (owing to double-exchange) and intra-layer interactions stabilizes a three-dimensional magnetic ordering in this frustrated magnet.

scholarly journals Designing magnetic superlattices that are composed of single domain nanomagnets

2014 ◽  
Vol 5 ◽  
pp. 956-963 ◽  
Author(s):  
Derek M Forrester ◽  
Feodor V Kusmartsev ◽  
Endre Kovács
Keyword(s):  
Phase Diagrams ◽  
Coupling Strength ◽  
Magnetic Moments ◽  
Magnetic Hysteresis ◽  
Single Domain ◽  
Magnetic Interactions ◽  
Dynamical Analysis ◽  
Complex Nature ◽  
Phase Boundaries ◽  
Average Magnetization

Background: The complex nature of the magnetic interactions between any number of nanosized elements of a magnetic superlattice can be described by the generic behavior that is presented here. The hysteresis characteristics of interacting elliptical nanomagnets are described by a quasi-static method that identifies the critical boundaries between magnetic phases. A full dynamical analysis is conducted in complement to this and the deviations from the quasi-static analysis are highlighted. Each phase is defined by the configuration of the magnetic moments of the chain of single domain nanomagnets and correspondingly the existence of parallel, anti-parallel and canting average magnetization states. Results: We give examples of the phase diagrams in terms of anisotropy and coupling strength for two, three and four magnetic layers. Each phase diagrams character is defined by the shape of the magnetic hysteresis profile for a system in an applied magnetic field. We present the analytical solutions that enable one to define the “phase” boundaries between the emergence of spin-flop, anti-parallel and parallel configurations. The shape of the hysteresis profile is a function of the coupling strength between the nanomagnets and examples are given of how it dictates a systems magnetic response. Many different paths between metastable states can exist and this can lead to instabilities and fluctuations in the magnetization. Conclusion: With these phase diagrams one can find the most stable magnetic configurations against perturbations so as to create magnetic devices. On the other hand, one may require a magnetic system that can easily be switched between phases, and so one can use the information herein to design superlattices of the required shape and character by choosing parameters close to the phase boundaries. This work will be useful when designing future spintronic devices, especially those manipulating the properties of CoFeB compounds.

scholarly journals Interplay between Quadrupolar and Magnetic Interactions in 5d1 Double Perovskite Ba2MgReO6 under Pressure

2022 ◽  
Vol 91 (1) ◽  
Author(s):  
Hiroto Arima ◽  
Yoshiaki Oshita ◽  
Daigorou Hirai ◽  
Zenji Hiroi ◽  
Kazuyuki Matsubayashi
Keyword(s):  
Double Perovskite ◽  
Magnetic Interactions

On the stability of calcium and cadmium based Ruddlesden–Popper and double perovskite structures

2021 ◽  
Author(s):  
Michel L. Marcondes ◽  
Samuel S. M. Santos ◽  
Ivan P. Miranda ◽  
Pedro Rocha-Rodrigues ◽  
Lucy V. C. Assali ◽  
...  
Keyword(s):  
Ab Initio ◽  
Phase Diagrams ◽  
Double Perovskite ◽  
Ferroelectric Materials ◽  
Stability Properties ◽  
The Stability

Ab initio study on stability properties and phase diagrams of Ca- and Cd-related hybrid improper ferroelectric materials with the Ruddlesden–Popper and double perovskite structures.

Phase diagrams and magnetic properties of double perovskite Ba2CrMoO6

2015 ◽  
Vol 29 (27) ◽  
pp. 1550174 ◽  
Author(s):  
M. Ait-Tamerd ◽  
B. Abraime ◽  
K. El Maalam ◽  
A. Benyoussef ◽  
A. El Kenz ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Magnetic Properties ◽  
Phase Diagrams ◽  
Mean Field ◽  
Magnetic Behavior ◽  
Double Perovskite ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
The Mean

In this paper, the Monte Carlo simulation (MCS) and the mean field approximation (MFA) methods have been used to study the magnetic properties of double perovskite Ba2CrMoO6 in the framework of the Ising model, which is important for a better understanding of the magnetic behavior of this material. This compound is constituted of two magnetic cubic sublattices: one occupied by Mo[Formula: see text] and other occupied Cr[Formula: see text], the critical exponents and phase diagrams for this compound are determined. The critical behavior, compensation temperature and susceptibility are also determined.

Ground state phase diagrams and magnetic properties of the double perovskite La2NiMnO6

2019 ◽  
Vol 16 (2) ◽  
pp. 281-292
Author(s):  
Ibtissam El Housni ◽  
Samira Idrissi ◽  
Najlae El Mekkaoui ◽  
Sara Mtougui ◽  
Rajaa Khalladi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Diagrams ◽  
Crystal Field ◽  
Ground State ◽  
Exchange Coupling ◽  
Hysteresis Loops ◽  
Magnetic Behavior ◽  
Double Perovskite ◽  
Physical Parameters ◽  
Content Type

Purpose The purpose of this paper is to investigate the magnetic properties and the ground state phase diagrams of the double perovskite La2NiMnO6 using the Monte Carlo simulations (MCS). Design/methodology/approach In this work, the authors propose a Hamiltonian modeling this compound, described by an Ising model, with different exchange coupling interactions J11, J12 and J22 between the only magnetic atoms Ni and Mn. Findings Starting with the ground state phase diagrams, the authors present and discuss the stable configurations in different physical parameter planes. On the other hand, the authors present the investigation of the magnetic properties and the magnetization behaviors of the magnetic susceptibilities, as a function of temperature, crystal field, the exchange coupling interactions and the Zeeman energy. To complete this study, the authors illustrate the dependency of the total magnetizations for the hysteresis loops of the double perovskite La2NiMnO6 compound. This study is done for fixed values of temperature, the exchange coupling interactions and crystal field. Originality/value The authors modeled the different physical parameters of the double perovskite La2NiMnO with a Hamiltonian describing the system. At T=0K, the authors discussed the ground state phase diagrams of different physical parameters planes. For non-null temperature values, the authors studied the magnetic behavior of the double perovskite La2NiMnO using MCS under the metropolis algorithm. The authors expect that the results of these simulations can provide some important keys for the experimental research and technology applications of the double perovskite La2NiMnO6 in the future.

scholarly journals Multiple magnetic interactions in ordered perovskite-structure oxides

2014 ◽  
Vol 70 (a1) ◽  
pp. C981-C981
Author(s):  
Yuichi Shimakawa
Keyword(s):  
High Pressure ◽  
Transition Metal ◽  
Transition Metal Oxides ◽  
Perovskite Structure ◽  
Double Perovskite ◽  
Transition Metal Ions ◽  
Magnetic Interactions ◽  
Spin Frustration ◽  
Tetrahedral Framework ◽  
Dependent Transport

Cation ordering in transition-metal oxides often drastically modifies their properties. We focus on A-and-B-site-ordered quadruple perovskite-structure oxides AA'3B2B'2O12, in which transition-metal ions are included at the A', B, and B' sites in an ordered manner. In such compounds A'-A', A'-B, A'-B', and B-B' interactions compete with each other and play important role in giving rise to unusual properties. The A-and-B-site-ordered quadruple perovskite CaCu3Fe2Sb2O12with magnetic Fe3+at the B site and nonmagnetic Sb5+at the B' site was successfully synthesized under a high-pressure and high-temperature condition. The B-site Fe3+spin sublattice adapts a tetrahedral framework and the Fe3+-Fe3+antiferromagnetic interaction causes geometrical spin frustration as seen in the double perovskite Ca2FeSbO6. With the introduction of Cu2+into the A' site, the frustration is relieved by strong antiferromagnetic A'(Cu2+)-B(Fe3+) interaction, leading to a ferrimagnetic ordering below 160 K. When B'-site Sb5+was replaced with Re5+, another A-and-B-site-ordered quadruple perovskite CaCu3Fe2Re2O12was synthesized by a high-pressure technique. The compound contains magnetic Fe3+at the B site and Re5+at the B' sites, and strong antiferromagnetic A'(Cu2+)-B'(Re5+) interaction overcomes the A'(Cu2+)-B(Fe3+) interaction, leading to a ferrimagnetism with the ferromagnetic A'(Cu2+)-B(Fe3+) spin arrangement below 550 K. More importantly, the electronic structure of CaCu3Fe2Re2O12is half metallic and the compound shows large magnetoresistance by the spin-dependent transport.

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