2011 Fiscal Year Final Research Report
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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| 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 |
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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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