First-order valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4)

J. M. De Teresa; D. T. Adroja; B. Rainford; K. S. Knight; A. Del Moral; M. R. Ibarra

doi:10.1016/S0921-4526(96)01142-8

First-order valence change in CeNi_1-xCo_xSn (0.35 ≤ × ≤ 0.4)

J. M. De Teresa, D. T. Adroja, B. Rainford, K. S. Knight, A. Del Moral, M. R. Ibarra

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

3 Citations (Scopus)

Abstract

The first-order Ce valence change in CeNi_1-xCo_xSn (0.35 ≤ × ≤ 0.4) has been studied using neutron diffraction. A dramatic change in the lattice parameters takes place at a valence transition temperature, T_v, which is strongly x dependent. The observed diffraction patterns are consistent with the orthorhombic Pnma space group above and below T_v. The transition occurs with coexistence of the high-and low-temperature phases across a certain range of temperature. The very narrow range of concentrations (0.35 ≤ × ≤ 0.4) which makes this first-order valence change possible seems to indicate that a very specific Ce local environment is neccesary for this transition. However, a careful Rietveld refinement has not clarified this point.

Original language	English
Pages (from-to)	872-874
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	234-236
DOIs	https://doi.org/10.1016/S0921-4526(96)01142-8
Publication status	Published - 2 Jun 1997
Externally published	Yes

Keywords

Intermediate valence
Phase transitions
Powder diffraction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(96)01142-8

Cite this

@article{83698e9fde2f4387b46e299a964b92aa,

title = "First-order valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4)",

abstract = "The first-order Ce valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4) has been studied using neutron diffraction. A dramatic change in the lattice parameters takes place at a valence transition temperature, Tv, which is strongly x dependent. The observed diffraction patterns are consistent with the orthorhombic Pnma space group above and below Tv. The transition occurs with coexistence of the high-and low-temperature phases across a certain range of temperature. The very narrow range of concentrations (0.35 ≤ × ≤ 0.4) which makes this first-order valence change possible seems to indicate that a very specific Ce local environment is neccesary for this transition. However, a careful Rietveld refinement has not clarified this point.",

keywords = "Intermediate valence, Phase transitions, Powder diffraction",

author = "{De Teresa}, {J. M.} and Adroja, {D. T.} and B. Rainford and Knight, {K. S.} and {Del Moral}, A. and Ibarra, {M. R.}",

year = "1997",

month = jun,

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doi = "10.1016/S0921-4526(96)01142-8",

language = "English",

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TY - JOUR

T1 - First-order valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4)

AU - De Teresa, J. M.

AU - Adroja, D. T.

AU - Rainford, B.

AU - Knight, K. S.

AU - Del Moral, A.

AU - Ibarra, M. R.

PY - 1997/6/2

Y1 - 1997/6/2

N2 - The first-order Ce valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4) has been studied using neutron diffraction. A dramatic change in the lattice parameters takes place at a valence transition temperature, Tv, which is strongly x dependent. The observed diffraction patterns are consistent with the orthorhombic Pnma space group above and below Tv. The transition occurs with coexistence of the high-and low-temperature phases across a certain range of temperature. The very narrow range of concentrations (0.35 ≤ × ≤ 0.4) which makes this first-order valence change possible seems to indicate that a very specific Ce local environment is neccesary for this transition. However, a careful Rietveld refinement has not clarified this point.

AB - The first-order Ce valence change in CeNi1-xCoxSn (0.35 ≤ × ≤ 0.4) has been studied using neutron diffraction. A dramatic change in the lattice parameters takes place at a valence transition temperature, Tv, which is strongly x dependent. The observed diffraction patterns are consistent with the orthorhombic Pnma space group above and below Tv. The transition occurs with coexistence of the high-and low-temperature phases across a certain range of temperature. The very narrow range of concentrations (0.35 ≤ × ≤ 0.4) which makes this first-order valence change possible seems to indicate that a very specific Ce local environment is neccesary for this transition. However, a careful Rietveld refinement has not clarified this point.

KW - Intermediate valence

KW - Phase transitions

KW - Powder diffraction

UR - http://www.scopus.com/inward/record.url?scp=0031548322&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(96)01142-8

DO - 10.1016/S0921-4526(96)01142-8

M3 - Article

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SN - 0921-4526

VL - 234-236

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EP - 874

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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