Magnetically Hidden State on the Ground Floor of the Magnetic Devil’s Staircase
Open accessAbstract
We investigated the low-temperature and high-field thermodynamic and ultrasonic properties of SrCu_{2}(BO_{3})_{2}, which exhibits various plateaux in its magnetization curve above 27 T, called a magnetic Devil's staircase. The results of the present study confirm that magnetic crystallization, the first step of the staircase, occurs above 27 T as a first-order transition accompanied by a sharp singularity in heat capacity C_{p} and a kink in the elastic constant. In addition, we observe a thermodynamic anomaly at lower fields around 26 T, which has not been previously detected by any magnetic probes. At low temperatures, this magnetically hidden state has a large entropy and does not exhibit Schottky-type gapped behavior, which suggests the existence of low-energy collective excitations. Based on our observations and theoretical predictions, we propose that magnetic quadrupoles form a spin-nematic state around 26 T as a hidden state on the ground floor of the magnetic Devil's staircase.
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The increase of C with dropping temperature might be caused by the tail structure of the field-induced first-order phase transition located outside the measurement window.
“In the present case, the increase of C with dropping temperature might be caused by the tail structure of the field-induced first-order phase transition located outside our measurement window.30,43”
From Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields (2023) · cites this paper as [30]
The main text (p. 3) reports a heat-capacity singularity at 28 T that strongly suggests a first-order field-induced crystallization transition. It does not say that an increase in heat capacity on cooling is the tail of a transition outside a measurement window, so the proposed explanation is not supported by this source. (LLM, conf=0.78)
Experimental — accuracy not yet measuredAbove 25 T, the sample temperature gradually increases due to the strong magnetocaloric effect inherent to SrCu2(BO3)2.
“turn leads to the gradual increase of temperature above 25 T, which is caused by the strong magnetocaloric effect inherent to SrCu 2 (BO 3 ) 2 .30”
From Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields (2023) · cites this paper as [30]
Figure 4(b) and its discussion (p. 4) report a magnetocaloric-effect measurement of field-dependent sample temperature in SrCu₂(BO₃)₂. Our copy describes a kink near 24 T and hysteresis below 27 T, but does not state that temperature gradually increases above 25 T; the figure itself is not readable in our text copy. (LLM, conf=0.79)
Experimental — accuracy not yet measuredThe thermal bath made of SrCu2(BO3)2 minimizes the temperature difference between sample and thermal bath induced by the large magnetocaloric effect in this material.
“In this work, the thermal bath made of SrCu 2 (BO 3 ) 2 minimizes the temperature difference between the sample and thermal bath induced by the large magnetocaloric effect in this material.30”
From Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields (2023) · cites this paper as [30]
The methods passage (p. 2) reports a magnetocaloric-effect measurement on SrCu₂(BO₃)₂, and Fig. 4 (p. 4) shows temperature changes during field sweeps. Neither passage says that a thermal bath was made of the material or that it minimized a sample–bath temperature difference; searches for those terms found no supporting passage in our copy. (LLM, conf=0.73)
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Cited by
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Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields
Nomoto, T., Zhong, C., Kageyama, H., Suzuki, Y., Jaime, M., Hashimoto, Y., Katsumoto, S., Matsuyama, N., Dong, C., Matsuo, A., et al. (2023) · arXiv · doi:10.48550/arxiv.2302.01627 · Cited by 5 · see citing works
Self-citation
- Authors
- Imajo, S., Matsuyama, N., Nomura, T., Kihara, T., Nakamura, S., Marcenat, C., Klein, T., Seyfarth, G., Zhong, C., Kageyama, H., Kindo, K., Momoi, T., & Kohama, Y.
- Affiliations
- The Institute for Solid State Physics, The University of Tokyo (JP)
- Tohoku University (JP)
- Institut polytechnique de Grenoble (FR)
- Centre National de la Recherche Scientifique (FR)
- Kyoto University (JP)
- RIKEN (JP)
- ORCID
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2022-09-29
- Volume
- 129
- Issue
- 14
- Pages
- 147201-147201
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W4221154122
- Cited by
- 12
- References
- 0
- Citations by year
- 2026: 5 · 2024: 4 · 2023: 3
- FWCI
- 0.65
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion, other-oa)
- arXiv (Cornell University)
- Funders
- Japan Society for the Promotion of Science (20K14406, 20K14403, 22H04466, 22H00104, JPJSCCA20200004)
- Centre National de la Recherche Scientifique
- European Magnetic Field Laboratory
- Topics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetic and transport properties of perovskites and related materials
- Keywords
- SrCu2(BO3)2, hidden states, magnetization plateau, magnetic quadrupole, first-order magnetic transition, ultrasonic properties, thermodynamic anomalies, high magnetic fields, low-temperature thermodynamics
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