Study on mechanism of novel magnetic phase transitions and anomalous transport properties in rare earth sulfides
| Project/Area Number |
20540329
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Muroran Institute of Technology |
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Principal Investigator |
EBISU Shuji 室蘭工業大学, 大学院・工学研究科, 准教授 (10250523)
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| Project Period (FY) |
2008 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 希土類三二硫化物 / 逐次磁気相転移 / 異常磁気伝導 / 圧力下物性 / 比熱 / 希土類硫化物 / 単結晶 / 磁気相転移 / 磁場中比熱 / 圧力効果 / ゼーベック係数 / ホール係数 / 磁気抵抗効果 / 強磁場磁化過程 / 強磁場中冷却 / 磁場中電気抵抗 / 複数磁性サイト |
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| Research Abstract |
In order to elucidate the mechanism of novel magnetic phase transitions and anomalous transport properties associated with the transitions in rare earth sulfides a-R_2S_3 (R : rare earth elements), measurements of magnetization and electrical resistivity in magnetic fields, specific heat and the Hall effect have been carried out. The a-R_2S_3 has two inequivalent R sites. It has been found out that the a-R_2S_3 except R=Gd shows successive magnetic phase transitions at which the magnetic moments on each R site order. The multiplicity of the ground state of rare earth atom on each site has also been clarified. Furthermore, novel physical properties were discovered ; one example is that the a- Sm_2S_3 shows an extremely large abrupt increase and decrease of electrical resistivity in a narrow temperature range.
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Report
(4 results)
Research Products
(48 results)
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[Presentation] α-Sm_2S_3の比熱2011
Author(s)
牛木雄史, 中野渡広祐, 戎修二, 永田正一
Organizer
日本物理学会第66回年次大会
Place of Presentation
新潟市(新潟大学)
Year and Date
2011-03-26
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[Presentation] 複合希土類酸化物の合成と磁性2011
Author(s)
高橋信, 小北正徳, 橋口啓伍, 戎修二, 永田正一
Organizer
第46回応用物理学会北海道支部学術講演会
Place of Presentation
室蘭市(室蘭工業大学)
Year and Date
2011-01-07
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