Effect of uniaxial pressure on the ferroelectric phase transition in PbGeO
Journal of Physics Condensed Matter, ISSN: 0953-8984, Vol: 11, Issue: 5, Page: 1341-1352
1999
- 18Citations
- 2Captures
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Article Description
The effect of uniaxial pressure (X) up to 1 kbar, applied along the three main directions, on the Curie temperature and the dielectric constant ε of a PbGeO single crystal was investigated. The Curie temperature decreases with uniaxial pressure and the coefficient γ (γ ≡ ∂T/∂(X) was determined as -6.5, -7.0 and -3.2 K kbar for a-, b- and c-axis respectively. It has been found that uniaxial pressure applied along the c-axis strengthens the second order phase transition but applied along the directions perpendicular to the c-axis it may induce a tricritical point. The critical uniaxial pressure was estimated from the ratio C /C against X to be about 2.4 kbar. A tentative description of the mechanism of changes in the phase transition order is given. The phenomenological relation describing γ is also discussed.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0005058318&origin=inward; http://dx.doi.org/10.1088/0953-8984/11/5/019; https://iopscience.iop.org/article/10.1088/0953-8984/11/5/019; https://dx.doi.org/10.1088/0953-8984/11/5/019; https://validate.perfdrive.com/fb803c746e9148689b3984a31fccd902/?ssa=e4ca2a6c-130b-42c4-8fe5-ef25e1879491&ssb=50234201197&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1088%2F0953-8984%2F11%2F5%2F019&ssi=3f3c1f8b-8427-43f1-b070-42e516ac6667&ssk=support@shieldsquare.com&ssm=716135036884121421451298280410469747&ssn=d989114a2151f927030fc4aa7628f967e72a17f9ea44-4e1f-4e35-bbb404&sso=ca35515e-f9d9f87a371fcfdafaf9a04fec9e40788151f2a8fd694f78&ssp=10288347261719392368171984761823544&ssq=62757973058485530428605699200340189177623&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJfX3V6bWYiOiI3ZjYwMDBjMGI2MzM1NC00OGRkLTRjNTUtODVmZS00NzZmMjgxYzE5ZDgxNzE5MzA1Njk5NDA1NTI0ODg1NTE0LTdkNmNkZDkzNmU4OWRkNTMxNDUxMTciLCJyZCI6ImlvcC5vcmciLCJ1em14IjoiN2Y5MDAwMWUxYTVkMGQtYjRlNi00ZTQ0LWFmYTgtNzUxMTFmZjg0ZDlmNy0xNzE5MzA1Njk5NDA1NTI0ODg1NTE0LWZiZThhMDBkZGMzNmVjYmQxNDUxMTQifQ==
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