| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2014: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Outline of Final Research Achievements |
Low-dimensional quantum spin systems and strongly correlated electron systems can quite often be obtained only as tiny single-crystalline samples. In this project, sensitivity of the low-temperature magnetometer, which the present principal investigator has been developed, is improved by a factor of 100 to be able to measure those tiny crystals. Some selected achievements: (1) Field and temperature variations of the magnetization of a spin 1/2 one dimensional Heisenberg antiferromagnet CuPzN are confirmed to precisely follow the predictions of the exact solutions. (2) Magnetization of a high-quality single crystal of Sr2RuO4 in a magnetic field applied exactly parallel to the c plane exhibits a sharp magnetization jump at the upper critical field at low temperatures, evidencing a first-order superconducting-normal transition. The results provide an important clue for elucidating its pairing symmetry.
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