| Project/Area Number |
16540333
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Condensed matter physics II
|
|---|
| Research Institution | Daido Institute of Technology |
|---|
Principal Investigator |
HARASHINA Hiroshi Daido Institute of Technology, School of Liberal Ars and Science, Associate Professor, 教養部, 助教授 (80293687)
|
|---|
| Project Period (FY) |
2004 – 2005
|
| Project Status |
Completed (Fiscal Year 2005)
|
| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥2,700,000 (Direct Cost: ¥2,700,000)
|
|---|
| Keywords | anomalous Hall effect / canted spin structure |
|---|
| Research Abstract |
We investigate an origin of the unusual behavior of the anomalous Hall Effect in metallic magnet CrTe_<1-x>Sb_x with a non-collinear magnetic structure. CrTe_<1-x>Sb_x has a NiAs-type structure. CrTe is ferromagnetic and CrSb is antiferromagnetic. In CrTe_<1-x>Sb_x with 0.25【less than or similar】x【less than or similar】0.7, a canted spin structure is formed at low temperatures. The Hall resistivity p_H of CrTe_<1-x>Sb_x shows unconventional temperature dependence
1.The resistivity p of polycrystalline samples of CrTe_<1-x>Sb_x of x=0.3〜0.5 has been measured from room temperature to 10 K. The observed resistivity decreases monotonously with decreasing temperature T for all samples. It is plausible that the unconventional temperature dependence of p_H is related to the appearance of the canted spin structure.
2.Single crystal growth of CrTe_<1-x>Sb_x has been performed for x=0.3 and 0.4. Small plate-like single crystals have been obtained but their quality is not enough to measurements of the magnetic and transport properties.
3.Powder neutron diffraction has been performed for CrTe_<1-x>Sb_x of x=0.3 and 0.4. Temperature dependence of ferromagnetic moments M does not exhibit significant change around transition temperatures at which the canted spin structure appears with decreasing T. The fact indicates that the complicated temperature dependence of p_H does not stem from the temperature dependence of M.
|
