Spontaneous strain due to ferroquadrupolar ordering in UCu2Sn
Physical Review B - Condensed Matter and Materials Physics Volume 68 Issue 14
Page 144413-1-144413-4
published_at 2003-10-08
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| File | |
| Title ( eng ) |
Spontaneous strain due to ferroquadrupolar ordering in UCu2Sn
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| Creator |
Higaki Haruhiro
Goshima Hiroshi
Fujita Toshizo
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| Source Title |
Physical Review B - Condensed Matter and Materials Physics
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| Volume | 68 |
| Issue | 14 |
| Start Page | 144413-1 |
| End Page | 144413-4 |
| 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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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2003-10-08 |
| Rights |
Copyright (c) 2003 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0163-1829
[DOI] 10.1103/PhysRevB.68.144413
[NCID] AA00362255
[DOI] http://dx.doi.org/10.1103/PhysRevB.68.144413
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