Spontaneous strain due to ferroquadrupolar ordering in UCu2Sn
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00018663
ID | 18663 |
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creator |
Higaki, Haruhiro
Goshima, Hiroshi
Fujita, Toshizo
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abstract | The ternary uranium compound UCu2Sn with a hexagonal ZrPt2Al-type structure shows a phase transition at 16 K. We reported previously that huge lattice softening is accompanied by the phase transition, which originates from ferroquadrupolar ordering of the ground-state nonKramers doublet Γ5. A macroscopic strain, which is expected to emerge spontaneously, was not detected by powder x-ray diffraction in the temperature range between 4.2 and 300 K. To search the spontaneous strain, we have carried out thermal expansion measurements on a single-crystalline sample along the a, b, and c axes using a capacitance technique with the resolution of 10-8. In the present experiment, we found the spontaneous exx-eyy strain, which couples to the ground state doublet Γ5. The effect of uniaxial pressure along the a, b, and c axes on the transition temperature is also discussed.
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journal title |
Physical Review B - Condensed Matter and Materials Physics
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volume | Volume 68
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issue | Issue 14
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start page | 144413-1
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end page | 144413-4
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date of issued | 2003-10-08
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publisher | American Physical Society
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issn | 0163-1829
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publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | Copyright (c) 2003 American Physical Society.
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relation url | |
department |
Graduate School of Advanced Sciences of Matter
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