| Project/Area Number |
24740240
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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 Metropolitan University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 磁性 / 強相関電子系 / 三角格子 / 単結晶育成 / 磁気構造解析 / 幾何学的フラストレート磁性 / PdCrO2 / PdCoO2 / 巨大磁気抵抗 |
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| Research Abstract |
We have studied the anomalous transport properties of the conductive triangular-lattice antiferromagnet PdCrO2 and nonmagnetic PdCoO2. We revealed that PdCrO2 consists of the noncoplanar spin structure, leading to a finite scalar spin chirality at a local site. This structure is probably related to the emergence of the unconventional anomalous Hall effect of this compound. For PdCoO2, we discovered the extremely large magnetoresistance that can reach up to 35000% of the zero field resistivity. Based on the semiclassical calculation, we revealed that the observed large magnetoresistance of PdCoO2 is closely related to the Lorentz-force-driven orbital motion of the high-mobility charge carries.
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