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Three-dimensional Ising critical behavior in R0.6Sr0.4MnO3(R=Pr,Nd) manganites
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Oleaga, A., Salazar, A., Ciomaga Hatnean, Monica and Balakrishnan, Geetha (2015) Three-dimensional Ising critical behavior in R0.6Sr0.4MnO3(R=Pr,Nd) manganites. Physical Review B, 92 (2). 024409. doi:10.1103/PhysRevB.92.024409
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Official URL: http://dx.doi.org/10.1103/PhysRevB.92.024409
Abstract
Magnetic as well as calorimetric measurements have been performed on single crystal samples of Pr0.6Sr0.4MnO3 and Nd0.6Sr0.4MnO3 to develop a complete critical behavior study of the paramagnetic to ferromagnetic transition in both manganites. The critical exponents α,β,γ , and δ have been independently obtained. For Pr0.6Sr0.4MnO3, these are α = 0.09, β = 0.312, γ = 1.106, and δ = 4.545, while for Nd0.6Sr0.4MnO3 they are α = 0.11, β = 0.308, γ = 1.172, and δ = 4.75. All these values agree with the three-dimensional (3D)-Ising universality class (α = 0.11, β = 0.3265, γ = 1.237, and δ = 4.79) and are very far away from any other known universality class. This suggests the presence of magnetocrystalline anisotropies in the system that must be taken into account to fully describe the magnetism of these manganites, which deviates from a simple double exchange model.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics Q Science > QE Geology |
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| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Manganite, Paramagnetism, Ferromagnetism, Anisotropy | ||||||
| Journal or Publication Title: | Physical Review B | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 13 July 2015 | ||||||
| Dates: |
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| Date of first compliant deposit: | 24 April 2017 | ||||||
| Volume: | 92 | ||||||
| Number: | 2 | ||||||
| Article Number: | 024409 | ||||||
| DOI: | 10.1103/PhysRevB.92.024409 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Copyright Holders: | American Physical Society | ||||||
| Funder: | Spain. Ministerio de Ciencia e Innovación (MICINN), Federación Española de Enfermedades Raras (FEDER), Universidad del País Vasco (UPV), Engineering and Physical Sciences Research Council (EPSRC) | ||||||
| Grant number: | MAT2011-23811 (MICINN), IT619-13 (FEDER), UFI11/55 (UPV), EP/I007210/1 (EPSRC) |
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