| Project/Area Number |
26800181
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Kurita Nobuyuki 東京工業大学, 大学院理工学研究科, 助教 (80566737)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 幾何学的フラストレーション / 高圧力 / 圧力誘起量子相転移 / 磁化測定 / 量子相転移 / 量子磁性体 |
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| Outline of Final Research Achievements |
The purpose of this study is to find a quantum phase transitin triggered by application of pressure in the geometrically frustrated quantum magnet. We have constructed a magnetic phase diagram of the S=1 triangular-lattice antiferromagnet CsFeCl3 with gapped ground state, via high-pressure magnetization measurements up to 1.5 GPa. It is found that at the critical pressure of ~0.9 GPa, CsFeCl3 exhibits a pressure-induced quantum phase transition from a nonmagnetic gapped ground state to a mangeically ordered state. In additon, we performed the low-temperature magnetization measurement of CsFeCl3 down to 0.5 K and revealed that a field-induced magnetic phase transition at ambient pressure can be underestood in the context of the Bose-Einstein condensation of magnon quasiparticles.
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