Cubic-tetragonal phase transition in Ca0.04Sr0.96TiO3: A combined specific heat and neutron diffraction study

M. C. Gallardo; A. I. Becerro; F. J. Romero; J. Del Cerro; F. Seifert; S. A.T. Redfern

doi:10.1088/0953-8984/15/2/309

Cubic-tetragonal phase transition in Ca_0.04Sr_0.96TiO₃: A combined specific heat and neutron diffraction study

M. C. Gallardo^*, A. I. Becerro, F. J. Romero, J. Del Cerro, F. Seifert, S. A.T. Redfern

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

The specific heat corresponding to the tetragonal-to-cubic transition in Ca_0.04Sr_0.96TiO₃ perovskite has been measured by conduction calorimetry. The order parameter of the transition has been obtained by means of neutron diffraction at low temperatures. Comparison of calorimetric data with the evolution of the order parameter indicates that this transition seems to follow a mean field Landau potential as in SrTiO₃. The linear behaviour of the excess of entropy versus temperature suggests that a 2-4 Landau potential is sufficient to describe the transition.

Original language	English
Pages (from-to)	91-100
Number of pages	10
Journal	Journal of Physics Condensed Matter
Volume	15
Issue number	2
DOIs	https://doi.org/10.1088/0953-8984/15/2/309
Publication status	Published - Jan 22 2003
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1088/0953-8984/15/2/309

Cite this

@article{1e2f25a5831b40f5b5964fd8b4f79c2e,

title = "Cubic-tetragonal phase transition in Ca0.04Sr0.96TiO3: A combined specific heat and neutron diffraction study",

abstract = "The specific heat corresponding to the tetragonal-to-cubic transition in Ca0.04Sr0.96TiO3 perovskite has been measured by conduction calorimetry. The order parameter of the transition has been obtained by means of neutron diffraction at low temperatures. Comparison of calorimetric data with the evolution of the order parameter indicates that this transition seems to follow a mean field Landau potential as in SrTiO3. The linear behaviour of the excess of entropy versus temperature suggests that a 2-4 Landau potential is sufficient to describe the transition.",

author = "Gallardo, {M. C.} and Becerro, {A. I.} and Romero, {F. J.} and {Del Cerro}, J. and F. Seifert and Redfern, {S. A.T.}",

year = "2003",

month = jan,

day = "22",

doi = "10.1088/0953-8984/15/2/309",

language = "English",

volume = "15",

pages = "91--100",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - Cubic-tetragonal phase transition in Ca0.04Sr0.96TiO3

T2 - A combined specific heat and neutron diffraction study

AU - Gallardo, M. C.

AU - Becerro, A. I.

AU - Romero, F. J.

AU - Del Cerro, J.

AU - Seifert, F.

AU - Redfern, S. A.T.

PY - 2003/1/22

Y1 - 2003/1/22

N2 - The specific heat corresponding to the tetragonal-to-cubic transition in Ca0.04Sr0.96TiO3 perovskite has been measured by conduction calorimetry. The order parameter of the transition has been obtained by means of neutron diffraction at low temperatures. Comparison of calorimetric data with the evolution of the order parameter indicates that this transition seems to follow a mean field Landau potential as in SrTiO3. The linear behaviour of the excess of entropy versus temperature suggests that a 2-4 Landau potential is sufficient to describe the transition.

AB - The specific heat corresponding to the tetragonal-to-cubic transition in Ca0.04Sr0.96TiO3 perovskite has been measured by conduction calorimetry. The order parameter of the transition has been obtained by means of neutron diffraction at low temperatures. Comparison of calorimetric data with the evolution of the order parameter indicates that this transition seems to follow a mean field Landau potential as in SrTiO3. The linear behaviour of the excess of entropy versus temperature suggests that a 2-4 Landau potential is sufficient to describe the transition.

UR - http://www.scopus.com/inward/record.url?scp=0037460326&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037460326&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/15/2/309

DO - 10.1088/0953-8984/15/2/309

M3 - Article

AN - SCOPUS:0037460326

SN - 0953-8984

VL - 15

SP - 91

EP - 100

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 2

ER -

Cubic-tetragonal phase transition in Ca_0.04Sr_0.96TiO₃: A combined specific heat and neutron diffraction study

Abstract

ASJC Scopus Subject Areas

Access to Document

Other files and links

Fingerprint

Cite this