X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCo$_{2}$O$_{5.5}$

Yu. P. Chernenkov; V. P. Plakhty; A. G. Gukasov; S. N. Barilo; S. V. Shiryaev; G. L. Bychkov; V. Hinkov; V. I. Fedorov; V. A. Chekanov

doi:10.1016/j.physleta.2006.12.067

X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCo$_{2}$O$_{5.5}$

Strongly Correlated Electrons 2015-06-25 v1 Materials Science

Authors: Yu. P. Chernenkov , V. P. Plakhty , A. G. Gukasov , S. N. Barilo , S. V. Shiryaev , G. L. Bychkov , V. Hinkov , V. I. Fedorov , V. A. Chekanov

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

A structural transition at $T\approx 322$ K from the $Pmmm$ to $Pmma$ phase is found to coincide with an anomaly of resistivity. Another structural phase transition doubling the lattice parameter $c$ , which has been postulated earlier to accompany a low-temperature magnetic transition in TbBaCo $_{2}$ O $_{5.5}$ , is observed in a single crystal DbBaCo $_{2}$ O $_{5.5}$ by means of the X-ray and neutron diffraction. The low temperature phase does not belong to the space group $Pcca$ that has been chosen earlier as the highest subgroup of the $Pmma$ . The transition is of the first order with the temperature hysteresis, between $T\approx 100$ and $T\approx 200$ K, which probably explains anomalous magnetic properties in this temperature range.

Keywords

structural phase transitions DyBaCo2O5.5 X-ray diffraction neutron diffraction space group temperature hysteresis

Cite

@article{arxiv.cond-mat/0612139,
  title  = {X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCo$_{2}$O$_{5.5}$},
  author = {Yu. P. Chernenkov and V. P. Plakhty and A. G. Gukasov and S. N. Barilo and S. V. Shiryaev and G. L. Bychkov and V. Hinkov and V. I. Fedorov and V. A. Chekanov},
  journal= {arXiv preprint arXiv:cond-mat/0612139},
  year   = {2015}
}

Comments

6 pages, 4 figures

X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCo$_{2}$O$_{5.5}$

Abstract

Keywords

Cite

Comments

Related papers