Three-dimensional Ising critical behavior in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>R</mml:mi><mml:mrow><mml:mn>0.6</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:msub><mml:mi mathvariant="normal">r</mml:mi><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub><mml:mi>Mn</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mspace width="0.28em" /><mml:mrow><mml:mo>(</mml:mo><mml:mi>R</mml:mi><mml:mo>

Oleaga, A.; Salazar, A.; Hatnean, Monica Ciomaga

doi:10.1103/physrevb.92.024409

Cited by 25 publications

(11 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…但从表2可看出, 对于多晶材料却往往反映出长程相互作用的平均场模型 [27,31] 或介于平均场和3D-Heisenberg (或3D-Ising)模型之间的临界参数 [28,30] . 根据Kim 等 [30] Jiang等 [35] 对于该体系在磁性金属性和绝缘性临…”

Section: 由于计算拟合过程受测试数据的精度以及拟合数据的选择范围影响较大要求等温磁化曲线测unclassified

“…而Ho等 [42] 对相同成分的多晶材料的研究发现, 空穴浓度为 0.29的样品呈现出长程相互作用的平均场模型. 这可能是由于其更加接近电荷有序相, 而超交换作用程略长于双交换作用 [35] , 相干长度更易达到晶粒尺度范围从而转变为平均场模型. 模型之间的临界行为 [27,28] .…”

Section: 钙钛矿锰氧化物的磁相变临界行为研究概况unclassified

“…对于La-Ca-Mn-O体系而言, 当空穴浓度约为0.2时其磁相变为二级, 在低场下获取的磁相变临界参数表明其内部铁磁相互作用接近短程3D-Heisenberg模型 [35] . 而空穴浓度约为 0.4时体现为三重临界行为 [33] .…”

Section: 不同磁场强度范围所得磁相变临界参数对比分析unclassified

See 2 more Smart Citations

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

Zhang¹,

Piao²,

Zhang³

et al. 2021

Acta Phys. Sin.

View full text Add to dashboard Cite

Hole-doped perovskite-type manganites have received intensive attention due to their intriguing physical phenomena such as giant magnetocaloric effect and magnetic-phase transitions. However, the mechanism of internal ferromagnetic interaction still needs to be further explored due to the complex natures of competing double-exchange (DE) and super-exchange (SE) interaction, Jahn-Teller (JT) polaron localization, charge ordering, and phase separation scenarios. Critical exponent analysis near magnetic phase transition is a powerful tool to investigate the details of the ferromagnetic interactions and has been used frequently in various magnetocaloric materials. In this article, the critical behavior analyses of perovskite manganites in recent years are comprehensively reviewed. A large number of studies have shown that even in single-phase materials with uniform structure and composition, the critical behavior can be affected by multiple factors such as grain boundary density and the degree of disorder, making them difficult to fully describe the intrinsic ferromagnetism. In this review, firstly, the critical behaviors of typical manganites with different bandwidths in single crystal and polycrystalline are discussed. In a double-exchange dominated system such as La-Sr-Mn-O, short-range 3D-Heisenberg model is basically in good accordance with optimally-doped single crystal sample. However, it would be replaced by long-range mean-field critical behavior in polycrystalline sample when the correlation length exceeds the crystallite size. In a typical intermediate bandwidth system such as La-Ca-Mn-O exhibiting a complex phase diagram described by competing SE/DE interactions, JT polaron localization/delocalization, and Griffith phase disorder, the critical exponent can vary from 3D-Heisenberg model to tricritical mean-field model, for the crossover from first to second order phase transition. Secondly, the studies of elements doping and different fabrication methods indicate that the critical behavior of manganites can be effectively modulated, and vary between different theoretical models including even nonuniversal exponent for highly disordered magnetic system. In the following part, the influence of magnetic field on the critical behavior and field induced crossover phenomena of La-Ca-Mn-O system near tricritical point is analyzed and discussed in detail. Furthermore, the magnetocaloric effects of materials near the tricritical point collected in many studies are listed and compared with each other. Excellent magnetocaloric properties with high magnetic entropy change and relative cooling power in plenty of researches indicate that ideal magnetocaloric material would be very likely to be found in the materials near the tricritical point, which lay at the borderline between first-order and second-order phase transition. Consequently, it is suggested that perovskite manganites are still quite promising in the potential magnetic refrigeration applications, and need to be further developed.

show abstract

Section: 由于计算拟合过程受测试数据的精度以及拟合数据的选择范围影响较大要求等温磁化曲线测unclassified

Section: 钙钛矿锰氧化物的磁相变临界行为研究概况unclassified

See 1 more Smart Citation

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

Zhang¹,

Piao²,

Zhang³

et al. 2021

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

“…Fan et al [26] have studied this particular composition (La 0.825 Sr 0.175 MnO 3 ) and claimed that it belongs to mean field class based on very limited data without any detailed critical analysis. However, it is beyond a doubt that phase transition in these class of materials cannot be explained by mean field model [17][18][19][20][21]27]. This paper aims to establish a complete understanding of the critical behavior of infinite-layer LSMO to find out the type and range of interaction responsible for ferromagnetic phases.…”

Section: Introductionmentioning

confidence: 99%

3D-Ising like ferromagnetism in skyrmionic-bubbles host infinite-layer La_0.825Sr_0.175MnO₃ manganite perovskite

Tiwari

Chauhan²,

Kumar³

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The critical behavior of infinite-layer La 0.825 Sr 0.175 MnO 3 of Ruddlesden-Popper series manganite has been studied around the transition temperature (T C ). To reveal the universality class that explains the critical behavior in La 0.825 Sr 0.175 MnO 3 several methods, such as modified Arrott plots, Kouvel-Fisher, entropy and critical isotherm analysis have been employed. The critical exponent δ for infinite-layer is obtained independently from critical magnetization isotherm and found to satisfy the Widom scaling relation δ = 1 + γ/β. The universality class of the critical phenomenon in infinite-layer La 0.825 Sr 0.175 MnO 3 manganite can be explained with the help of renormalization group theory approach for three dimensional (3D) systems. We have shown that a short-range 3D-Ising type interaction is responsible for ferromagnetic and second-order phase transition to paramagnetic phase.

show abstract

“…They report that even the very low level of doping has 'dramatic' effects on the EPR linewidth behaviour and therefore on the exchange mechanisms. They report difficulty in fitting their data to the commonly used Ginzberg-Landau critical model [11], according to which,…”

mentioning

confidence: 99%

Unexpected Effectiveness of Berezinskii-Kosterlitz-Thouless Description of Electron Paramagnetic Resonance Linewidth Behaviour in the 3-Dimensional Manganite Bi$_{0.5}$Sr$_{0.5}$Mn$_{0.9}$Cr$_{0.1}$O$_3$

Ashoka,

Bhagyashree,

Bhat

2018

Preprint

View full text Add to dashboard Cite

†Academies' Summer FellowWe find that the temperature dependence of the Electron Paramagnetic Resonance (EPR) linewidth observed in Bi0.5Sr0.5Mn0.9Cr0.1O3 (BSMCO), as well as in certain other 3-dimensional manganites undergoing antiferromagnetic transitions is satisfactorily described by the Berezinskii-Kosterlitz-Thouless (BKT) model. We understand this unexpected result in terms of an effective 2-dimensional XY easy plane anisotropy induced by the magnetic field applied in the EPR experiment. This conclusion is supported by the field dependence of the BKT correlations observed in the quasi two-dimensional antiferromagnetic compound BaNi2V2O8.

show abstract

Three-dimensional Ising critical behavior inR0.6Sr0.4MnO3(R

Cited by 25 publications

References 47 publications

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

3D-Ising like ferromagnetism in skyrmionic-bubbles host infinite-layer La_0.825Sr_0.175MnO₃ manganite perovskite

Unexpected Effectiveness of Berezinskii-Kosterlitz-Thouless Description of Electron Paramagnetic Resonance Linewidth Behaviour in the 3-Dimensional Manganite Bi$_{0.5}$Sr$_{0.5}$Mn$_{0.9}$Cr$_{0.1}$O$_3$

Contact Info

Product

Resources

About

Three-dimensional Ising critical behavior inR0.6Sr0.4MnO3(R

Cited by 25 publications

References 47 publications

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

Research progress of critical behaviors and magnetocaloric effects of perovskite manganites

3D-Ising like ferromagnetism in skyrmionic-bubbles host infinite-layer La0.825Sr0.175MnO3 manganite perovskite

Unexpected Effectiveness of Berezinskii-Kosterlitz-Thouless Description of Electron Paramagnetic Resonance Linewidth Behaviour in the 3-Dimensional Manganite Bi$_{0.5}$Sr$_{0.5}$Mn$_{0.9}$Cr$_{0.1}$O$_3$

Contact Info

Product

Resources

About

3D-Ising like ferromagnetism in skyrmionic-bubbles host infinite-layer La_0.825Sr_0.175MnO₃ manganite perovskite