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Isostructural Transition of MgB2 Under High Pressure |
| SUN Li-Ling1;T. Kikegawa2;WU Qi1;ZHAN Zai-Ji1;WANG Wen-Kui1,3 |
| 1Laboratory of Extreme Condition Physics, Institute of Photon Factory, Institute for Materials Structure Science, High Energy Accelerator Organization, Tsukuba, 355-0801, Japan
2College of Material Science and Chemical Engineering, Yanshan University, Qinhuangdao 066004
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| Cite this article: |
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SUN Li-Ling, T. Kikegawa, WU Qi et al 2001 Chin. Phys. Lett. 18 1401-1403 |
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Abstract The high-pressure behaviour of superconductor MgB2 with hexagonal structure has been investigated by the in-situ synchrotron radiation x-ray diffraction method under pressures up to 42.2GPa in a diamond anvil cell. An abrupt decrease of about 7% in the unit cell volume of this material occurs in the pressure range of 26.3 to 30.2 GPa. A split of Raman spectrum was also observed. The jump of compression curve and Raman spectrum are ascribed to an isostructural transition in MgB2 at the pressure of 30.2GPa.
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| Keywords:
74.62.Bf
74.62.Fj
61.10.-i
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Published: 01 October 2001
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| PACS: |
74.62.Bf
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(Effects of material synthesis, crystal structure, and chemical composition)
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74.62.Fj
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(Effects of pressure)
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61.10.-i
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