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Charge-ordering breakdown dynamics and ferromagnetic resonance studies ofB-site Cu diluted Pr1‒xSrxMnO3.
Bordoloi, A; Jena, S K; Tiwari, P; Datta, A; Weise, B; Medwal, R; Rawat, R S; Thota, S.
Afiliación
  • Bordoloi A; Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
  • Jena SK; Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
  • Tiwari P; Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
  • Datta A; Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
  • Weise B; Leibniz-IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany.
  • Medwal R; Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.
  • Rawat RS; Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore.
  • Thota S; Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
J Phys Condens Matter ; 36(29)2024 Apr 25.
Article en En | MEDLINE | ID: mdl-38588673
ABSTRACT
Here, we report the influence of Jahn-Teller active Cu substitution on the charge-ordering (CO) characteristics of one of the well-known manganite Pr0.45Sr0.55MnO3(S55) with a distorted tetragonal structure. Magnetization studies unveil a complex magnetic phase diagram for S55, showing distinct temperature ranges corresponding to various magnetic phases a ferromagnetic phase dominated by the Double Exchange interaction withTC∼ 220.5 K, an antiferromagnetic phase belowTN∼ 207.6 K induced by CO with a transition temperature ofTCO∼ 210 K consistent with the specific heatCP(T) data, and a mixed phase in the rangeTNcharge-ordered state, leading to enhanced ferrimagnetic order withTFN∼273 K and significant magnetocrystalline anisotropy as confirmed by ferromagnetic resonance (FMR) studies. The Cu-substituted system displays a distinct cationic distribution compared to the pristine S55, contributing to its diverse magnetic structure. Our findings also reveal the irreversible metamagnetic transition (HT-Max∼ 8.85 kOe at 180 K) associated with the CO phenomena in S55 and the first-order nature of the phase transition acrossTCO. The magnetic heat capacity critical analysis (CMag=A(T-TN)-α) yields the exponent,α=0.097 (0.154) in the regionT>TN(Tmagnetic structure. The temperature dependence of FMR resonance field ΔHRes(T), peak-to-peak widthHPP(T), and Gilbert damping factorαG(T) show clear anomalies across the magnetic transitions signifying the important role of admixtured (3+/4+) electronic state of Mn. Additionally, a strong correlation between the FMRαG(T) and switchable magnetic entropy change (ΔSMax∼-8/+ 3 J kg-1K-1forΔH=90 kOe) has also been established in S55.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido