Study on new magnetostrictive materials using spin state and unusual crystal orientation dependence
| Project/Area Number |
16K18262
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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 |
Structural/Functional materials
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| Research Institution | Ibaraki National College of Technology |
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Principal Investigator |
SATO Keisuke 茨城工業高等専門学校, 国際創造工学科, 准教授 (10418212)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 磁歪 / コバルト酸化物 / 結晶方位依存性 / スピン状態 / 双晶変形 / 構造・機能材料 |
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| Outline of Final Research Achievements |
The present study investigates crystalline orientation dependence of magnetostriction of twinned rhombohedral perovskite cobalt oxide, La0.8Sr0.2CoO3. The magnetostriction in a magnetic field applied along the pseudo-cubic [111]c and [110]c axes showed large hysteresis and residual strains. On the other hand, hysteresis and residual strain were not observed in the applied magnetic field along the [001]c axis. The large hysteresis and residual strains of the magnetostriction along the [111]c and [110]c axes are successfully interpreted as a rearrangement of the rhombohedral domains with the magnetocrystalline hard axis along the rhombohedral [111]r. In the preliminary analysis, the anisotropy energy was determined as -0.12 MJ/m3, which has the same magnitude as that of Ni2MnGa (0.2 MJ/m3). The no hysteresis and no residual strain of the magnetostriction along the [001]c axis are interpreted by equal projection to [001]c axis of [111]r of all the domains.
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Report
(3 results)
Research Products
(4 results)
