Critical behavior and magnetocaloric effect in the multiferroic double perovskite Lu2NiMnO6

Zhang, Lu; Shi, Tan; Cao, Jiejie; Yan, Shiming; Fang, Y.; Han, Zhuo; Qian, Bin; Jiang, Xuefan; Wang, D.H.

doi:10.1016/j.jallcom.2018.06.001

Cited by 15 publications

(5 citation statements)

References 24 publications

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“…Despite extensive studies, a comprehensive knowledge of the phase transitions does not exist or, where available, does not suffice to interpret conclusively and unambiguously in complex systems. It further manifests that the experimentally estimated critical exponents do not belong to any of the conventional universality classes [18][19][20][21][22][23][24][25][26][27][28][29] in manganite perovskite and double perovskites. An anti-site disorder and inhomogeneities are ubiquitous and lead to the distribution of exchange interaction strength and complexity [30][31][32].…”

Section: Introductionmentioning

confidence: 86%

Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Chakraborty,

Elizabeth

2023

J. Phys.: Condens. Matter

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The critical behavior at the ferromagnetic to paramagnetic phase transition of a Griffiths ferromagnet, Ho2NiMnO6, is studied using modified Arrott plot, Kouvel-Fischer, and critical isotherm analysis. Here, we report a second-order phase transition and conclude from the estimated critical exponents that it is unusual and do not belong to conventional universality classes. However, they obey scaling relationships, which indicates the renormalization of interactions around the phase transition temperature. The presence of Griffiths phase in the system accounts for the unusual critical exponents observed.

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Section: Introductionmentioning

confidence: 86%

Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Chakraborty,

Elizabeth

2023

J. Phys.: Condens. Matter

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“…The value of δ is 3.0 for Mean Field Model, 4.8 for 3D Heisenberg Model, 4.82 for 3D Ising Model, and 5 for the Tricritical mean-field model [25]. Thus, the estimated value of the critical parameters for EPCMO follows the conventional mean-field scaling hypothesis [25,42,43]. The critical behavior study in other related DPs shows that the critical exponents are close to other conventional scaling hypotheses like 3D Ising model and 3D Heisenberg model [44,45].…”

Section: Magnetic Studymentioning

confidence: 80%

Multifunctional behaviour in B-site disordered double perovskite EuPrCoMnO₆

Alam¹,

Ghosh²,

Majumder³

et al. 2022

J. Phys. D: Appl. Phys.

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We report magnetic, transport, dielectric, and complex impedance of polycrystalline double perovskite EuPrCoMnO6 which crystallizes in disordered orthorhombic phase with space group Pnma. The DC magnetization shows two successive ferromagnetic transitions around 146 K and 138 K. The temperature and magnetic field variation of DC-susceptibility suggest the existence of Griffith phase and spontaneous exchange bias. AC susceptibility measurement shows a glassy dynamic behaviour near ferromagnetic transition. Further, a re-entrant glassy dynamic state is seen at a low temperature around 40 K. Temperature-dependent resistivity shows semiconducting/insulating nature, which gets increased under the application of magnetic field, showing positive magnetoresistance. The dielectric study shows usual frequency-dependent step-like behaviour with a colossal dielectric constant near room temperature. The complex impedance study shows both grain and grain boundary contribute to the electrical properties. The observed properties suggest the material can be used for spintronic devices and high dielectric applications.

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“…Moreover, besides Ho 2 NiMnO 6 [30], several other double perovskites such as Pr 2 CoMnO 6 [19], Nd 2 CoMnO 6 [45], Tb 2 NiMnO 6 [18], La 2 FeMnO 6 [46] etc have also been shown to exhibit the Griffiths phase. Conversely, La 2 Ni 0.5 Mn 1.5 O 6 [47], Dy 2 NiMnO 6 , Gd 2 CoMnO 6 [48], Lu 2 NiMnO 6 [49] etc do not exhibit Griffiths phase-like characteristics and controversy remains in Dy 2 CoMnO 6 [48,50,51].…”

Section: Griffiths Phase R B Griffiths Actually Coined the Term For D...mentioning

confidence: 99%

Unraveling the origin of the Griffiths phase in Ho₂NiMnO₆: perspectives from linear and nonlinear AC susceptibility

Chakraborty,

Sharma,

Elizabeth

2024

Phys. Scr.

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In this study, we investigated the magnetic ordering and underlying mechanism of the Griffiths phase, observedin Ho2NiMnO6 through AC susceptibility measurements. Our results indicate that the transition around 86K corresponds to a paramagnetic to ferromagnetic transition characterized by classical magnetic ordering.Notably, nonlinear AC susceptibility measurements revealed the existence of ferromagnetic clusters within aparamagnetic background well above the transition temperature, establishing this as the origin of the Griffithslike phase within the Ni/Mn sublattice of Ho2NiMnO6. Our study on the Ho2NiMnO6 system provides insightinto the intricate magnetic phenomena common to various other strongly correlated electron systems.

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Critical behavior and magnetocaloric effect in the multiferroic double perovskite Lu2NiMnO6

Cited by 15 publications

References 24 publications

Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Multifunctional behaviour in B-site disordered double perovskite EuPrCoMnO₆

Unraveling the origin of the Griffiths phase in Ho₂NiMnO₆: perspectives from linear and nonlinear AC susceptibility

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Critical behavior and magnetocaloric effect in the multiferroic double perovskite Lu2NiMnO6

Cited by 15 publications

References 24 publications

Unusual critical behavior of Griffiths ferromagnet Ho2NiMnO6 at magnetic phase transition

Unusual critical behavior of Griffiths ferromagnet Ho2NiMnO6 at magnetic phase transition

Multifunctional behaviour in B-site disordered double perovskite EuPrCoMnO6

Unraveling the origin of the Griffiths phase in Ho2NiMnO6: perspectives from linear and nonlinear AC susceptibility

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Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Unusual critical behavior of Griffiths ferromagnet Ho₂NiMnO₆ at magnetic phase transition

Multifunctional behaviour in B-site disordered double perovskite EuPrCoMnO₆

Unraveling the origin of the Griffiths phase in Ho₂NiMnO₆: perspectives from linear and nonlinear AC susceptibility