Magnetoelastic coupling at spin-glass-like transition in Sr3NiSb2O9
| Autor: | Saurav Giri, Martin v. Zimmermann, S.K. Chatterjee, Ann-Christin Dippel, Subham Majumdar, Olof Gutowski, Ashok Chatterjee |
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| Rok vydání: | 2019 |
| Předmět: |
Range (particle radiation)
Materials science Spin glass Condensed matter physics Dynamical scaling Magnetometer Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences 0104 chemical sciences law.invention Mechanics of Materials law Magnetic frustration Materials Chemistry Synchrotron diffraction Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Ground state Magnetoelastic coupling |
| Zdroj: | Journal of Alloys and Compounds. 778:30-36 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.11.074 |
| Popis: | We report a characteristic spin-glass-like behavior in Sr3NiSb2O9, as confirmed from the low-field dc magnetometry and ac susceptibility measurements. The memory effects in the dc magnetometry exhibit similar characteristic features of the spin-glass systems. The ac susceptibility measurements provide that the frequency dependent peak-shift follows the conventional Vogel-Fulcher and dynamical scaling laws with the characteristic relaxation time to be ∼ 10−14 s. This relaxation time fits in the recommended range of ∼ 10 − 12 − 10 − 14 s for the classical spin-glasses. Low temperature synchrotron diffraction studies point to the strong magnetoelastic coupling close to the spin-glass-like transition. The transition is found to be associated with the step-like anomalous lattice contraction. Possible origin of magnetic frustration leading to the spin-glass ground state is discussed by correlating the microstructural results, as obtained from the analysis of synchrotron diffraction studies. |
| Databáze: | OpenAIRE |
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