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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.16994 |
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| _version_ | 1866913684369965056 |
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| author | Jakovac, Ivan Cvitanić, Tonči Arčon, Denis Herak, Mirta Cinčić, Dominik Topić, Nea Baus Hosokoshi, Yuko Ono, Toshio Iwashita, Ken Hayashi, Nobuyuki Amaya, Naoki Matsuo, Akira Kindo, Koichi Lončarić, Ivor Horvatić, Mladen Takigawa, Masashi Grbić, Mihael S. |
| author_facet | Jakovac, Ivan Cvitanić, Tonči Arčon, Denis Herak, Mirta Cinčić, Dominik Topić, Nea Baus Hosokoshi, Yuko Ono, Toshio Iwashita, Ken Hayashi, Nobuyuki Amaya, Naoki Matsuo, Akira Kindo, Koichi Lončarić, Ivor Horvatić, Mladen Takigawa, Masashi Grbić, Mihael S. |
| contents | We present the properties of a new organic $S=1$ antiferromagnetic chain system $m$-NO$_2$PhBNO (abbreviated BoNO). In this biradical system two unpaired electrons from aminoxyl groups are strongly ferromagnetically coupled ($|J_\text{FM}| /k_B \gtrsim 500$ K) which leads to the formation of an effective $S=1$ state for each molecule. The chains of BoNO biradicals propagate along the crystallographic $a$ axis. Temperature dependence of the $g$ factor and electron paramagnetic resonance (EPR) linewidth are consistent with a low-dimensional system with antiferromagnetic interactions. The EPR data further suggest that BoNO is the first known Haldane system with an almost isotropic $g$ factor ($2.0023 \pm 2 \unicode{x2030}$). The magnetization measurements in magnetic fields up to $40$ T and low-field susceptibility, together with $^1$H nuclear magnetic resonance (NMR) spectra, reveal a dominant intrachain antiferromagnetic exchange coupling of $J_\text{1D}/k_B = (11.3\pm0.1)$ K, and attainable critical magnetic fields of $μ_0 H_\text{c1} \approx 2$ T and $μ_0 H_\text{c2} \approx 33$ T. These measurements therefore suggest that BoNO is a unique Haldane system with extremely small magnetic anisotropy. Present results are crucial for a future in-depth NMR study of the low-temperature Tomonaga-Luttinger liquid (TLL) and magnetic field-induced phases, which can be performed in the entire phase space. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16994 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Properties of an organic model $S=1$ Haldane chain system Jakovac, Ivan Cvitanić, Tonči Arčon, Denis Herak, Mirta Cinčić, Dominik Topić, Nea Baus Hosokoshi, Yuko Ono, Toshio Iwashita, Ken Hayashi, Nobuyuki Amaya, Naoki Matsuo, Akira Kindo, Koichi Lončarić, Ivor Horvatić, Mladen Takigawa, Masashi Grbić, Mihael S. Strongly Correlated Electrons We present the properties of a new organic $S=1$ antiferromagnetic chain system $m$-NO$_2$PhBNO (abbreviated BoNO). In this biradical system two unpaired electrons from aminoxyl groups are strongly ferromagnetically coupled ($|J_\text{FM}| /k_B \gtrsim 500$ K) which leads to the formation of an effective $S=1$ state for each molecule. The chains of BoNO biradicals propagate along the crystallographic $a$ axis. Temperature dependence of the $g$ factor and electron paramagnetic resonance (EPR) linewidth are consistent with a low-dimensional system with antiferromagnetic interactions. The EPR data further suggest that BoNO is the first known Haldane system with an almost isotropic $g$ factor ($2.0023 \pm 2 \unicode{x2030}$). The magnetization measurements in magnetic fields up to $40$ T and low-field susceptibility, together with $^1$H nuclear magnetic resonance (NMR) spectra, reveal a dominant intrachain antiferromagnetic exchange coupling of $J_\text{1D}/k_B = (11.3\pm0.1)$ K, and attainable critical magnetic fields of $μ_0 H_\text{c1} \approx 2$ T and $μ_0 H_\text{c2} \approx 33$ T. These measurements therefore suggest that BoNO is a unique Haldane system with extremely small magnetic anisotropy. Present results are crucial for a future in-depth NMR study of the low-temperature Tomonaga-Luttinger liquid (TLL) and magnetic field-induced phases, which can be performed in the entire phase space. |
| title | Properties of an organic model $S=1$ Haldane chain system |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.16994 |