Multiferroic quantum criticality in (Eu,Ba,Sr)TiO$_3$ solid solution
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
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2024
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| _version_ | 1866911913113288704 |
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| author | Repček, Dalibor Proschek, Petr Savinov, Maxim Kachlík, Martin Pospíšil, Jiří Drahokoupil, Jan Doležal, Petr Prokleška, Jan Kamba, Stanislav |
| author_facet | Repček, Dalibor Proschek, Petr Savinov, Maxim Kachlík, Martin Pospíšil, Jiří Drahokoupil, Jan Doležal, Petr Prokleška, Jan Kamba, Stanislav |
| contents | Based on the earlier published theory (\textit{Nature Mat}. \textbf{18}, 223--228 (2019)), a comprehensive experimental investigation of multiferroic quantum critical behavior of (Eu,Ba,Sr)TiO$_3$ polycrystalline and single crystal samples was performed. Presence of the displacive ferroelectric quantum criticality is revealed through non-classical ($T^2$) temperature scaling of inverse dielectric susceptibility up to 60\,K. With increasing hydrostatic pressure, this ferroelectric quantum criticality is gradually suppressed. Inverse magnetic susceptibility follows classical Curie-Weiss law down to 4 K, but quantum fluctuations belonging to an antiferromagnetic phase transition ($T_{\mathrm{N}} < 0.8$ K) change its scaling below 3 K to $T^{(1.7\pm 0.1)}$ and $T^{(2.1\pm 0.2)}$ for samples containing 29\,\% and 25\,\% of Eu$^{2+}$ ions, respectively. Experimental indications of the coexisting ferroelectric and antiferromagnetic, i.e. multiferroic, quantum fluctuations and qualitative explanation why they could be seen only in the immediate proximity of $T_{\mathrm{N}}$ is given. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_04677 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiferroic quantum criticality in (Eu,Ba,Sr)TiO$_3$ solid solution Repček, Dalibor Proschek, Petr Savinov, Maxim Kachlík, Martin Pospíšil, Jiří Drahokoupil, Jan Doležal, Petr Prokleška, Jan Kamba, Stanislav Materials Science Strongly Correlated Electrons Based on the earlier published theory (\textit{Nature Mat}. \textbf{18}, 223--228 (2019)), a comprehensive experimental investigation of multiferroic quantum critical behavior of (Eu,Ba,Sr)TiO$_3$ polycrystalline and single crystal samples was performed. Presence of the displacive ferroelectric quantum criticality is revealed through non-classical ($T^2$) temperature scaling of inverse dielectric susceptibility up to 60\,K. With increasing hydrostatic pressure, this ferroelectric quantum criticality is gradually suppressed. Inverse magnetic susceptibility follows classical Curie-Weiss law down to 4 K, but quantum fluctuations belonging to an antiferromagnetic phase transition ($T_{\mathrm{N}} < 0.8$ K) change its scaling below 3 K to $T^{(1.7\pm 0.1)}$ and $T^{(2.1\pm 0.2)}$ for samples containing 29\,\% and 25\,\% of Eu$^{2+}$ ions, respectively. Experimental indications of the coexisting ferroelectric and antiferromagnetic, i.e. multiferroic, quantum fluctuations and qualitative explanation why they could be seen only in the immediate proximity of $T_{\mathrm{N}}$ is given. |
| title | Multiferroic quantum criticality in (Eu,Ba,Sr)TiO$_3$ solid solution |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.04677 |