Rare earth effect on the critical behavior of La0.75Ln0.05Sr0.2MnO3 manganites
Source abstract
Abstract
Abstract In this work, we have investigated the effect of rare earth substitution in La0.75Ln0.05Sr0.2MnO3 (Ln˭La, Sm, Eu, Gd, Dy and Ho) manganites on the critical behavior near the magnetic phase transition temperature. Different techniques were used to determine the values of the critical exponents β, γ and δ as well as transition temperature TC. The reliability of the critical exponents values was confirmed by both Widom relation and scaling hypothesis. In the case of Ln˭La, Sm, Eu, Gd and Ho, the magnetic interactions were described by 3D-Ising model. However, the substitution by Dy ions changes the universality class from 3D-Ising to tricritical mean field, which can be ascribed to the intrinsic contribution of Dy3+ ions.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Rare-earth and actinide compounds
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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