A novel reentrant susceptibility due to vortex and magnetic dipole interaction in a La1.85Sr0.15CuO4 and Gd2O3 composite system
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| Format: | Preprint |
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2024
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| _version_ | 1866916307745636352 |
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| author | Dutta, Biswajit Banerjee, A. |
| author_facet | Dutta, Biswajit Banerjee, A. |
| contents | A reentrant behavior of temperature dependent magnetic ac-susceptibility (or excess susceptibility(ES)) at lower temperature is observed in a composite made of superconductor $La_{1.85}Sr_{0.15}CuO_4$ (LCu) and an insulating paramagnetic salt $Gd_2O_3$ (GdO). The ES exhibits an exponential characteristic that varies with temperature ($\exp,[\frac{T_0}{T}]$), T0 is characteristics temperature. The characteristics temperature,T$_0$, decreases as the effective interface diminishes and the amplitude of the dc magnetic field increases. The creation of ferromagnetic dimers between Gd$^{+3}$ ions in GdO is observed as a result of vortex-dipole interaction, which causes the observation of this unusual ES at temperatures much lower than the superconducting onset temperature T$_{S}^{onset}$. This type of ferromagnetic dimer formation much below superconducting transition temperature is found comparable with the formation of Yu-Shiba-Rusinov (YSR) state and interaction between these YSR state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_00715 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A novel reentrant susceptibility due to vortex and magnetic dipole interaction in a La1.85Sr0.15CuO4 and Gd2O3 composite system Dutta, Biswajit Banerjee, A. Strongly Correlated Electrons A reentrant behavior of temperature dependent magnetic ac-susceptibility (or excess susceptibility(ES)) at lower temperature is observed in a composite made of superconductor $La_{1.85}Sr_{0.15}CuO_4$ (LCu) and an insulating paramagnetic salt $Gd_2O_3$ (GdO). The ES exhibits an exponential characteristic that varies with temperature ($\exp,[\frac{T_0}{T}]$), T0 is characteristics temperature. The characteristics temperature,T$_0$, decreases as the effective interface diminishes and the amplitude of the dc magnetic field increases. The creation of ferromagnetic dimers between Gd$^{+3}$ ions in GdO is observed as a result of vortex-dipole interaction, which causes the observation of this unusual ES at temperatures much lower than the superconducting onset temperature T$_{S}^{onset}$. This type of ferromagnetic dimer formation much below superconducting transition temperature is found comparable with the formation of Yu-Shiba-Rusinov (YSR) state and interaction between these YSR state. |
| title | A novel reentrant susceptibility due to vortex and magnetic dipole interaction in a La1.85Sr0.15CuO4 and Gd2O3 composite system |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2407.00715 |