Study of temperature dependent atomic correlations in MgB2

G. Campi; E. Cappelluti; Th Proffen; X. Qiu; E. S. Bozin; S. J.L. Billinge; S. Agrestini; N. L. Saini; A. Bianconi

doi:10.1140/epjb/e2006-00269-7

Study of temperature dependent atomic correlations in MgB₂

G. Campi
, E. Cappelluti
, Th Proffen
, X. Qiu
, E. S. Bozin
, S. J.L. Billinge
, S. Agrestini
, N. L. Saini
, A. Bianconi

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

30 Scopus citations

Abstract

We have studied temperature evolution of the local as well as the average crystal structure of MgB₂ using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T=10-600 K. We find small positive correlation factors for the B-B and B-Mg pairs, determined by mean-square displacements (MSD) and the mean-square relative displacements (MSRD). We analyze the PDF using both Einstein and force constant models finding a good agreement between the experimental data and the two models. This indicates that B and Mg atomic correlations are not sensitive to the details of phonon dispersion.

Original language	English
Pages (from-to)	15-21
Number of pages	7
Journal	Zeitschrift für Physik B Condensed Matter
Volume	52
Issue number	1
DOIs	https://doi.org/10.1140/epjb/e2006-00269-7
State	Published - Jul 2006
Externally published	Yes

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abstract = "We have studied temperature evolution of the local as well as the average crystal structure of MgB2 using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T=10-600 K. We find small positive correlation factors for the B-B and B-Mg pairs, determined by mean-square displacements (MSD) and the mean-square relative displacements (MSRD). We analyze the PDF using both Einstein and force constant models finding a good agreement between the experimental data and the two models. This indicates that B and Mg atomic correlations are not sensitive to the details of phonon dispersion.",

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T1 - Study of temperature dependent atomic correlations in MgB2

AU - Campi, G.

AU - Cappelluti, E.

AU - Proffen, Th

AU - Qiu, X.

AU - Bozin, E. S.

AU - Billinge, S. J.L.

AU - Agrestini, S.

AU - Saini, N. L.

AU - Bianconi, A.

PY - 2006/7

Y1 - 2006/7

N2 - We have studied temperature evolution of the local as well as the average crystal structure of MgB2 using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T=10-600 K. We find small positive correlation factors for the B-B and B-Mg pairs, determined by mean-square displacements (MSD) and the mean-square relative displacements (MSRD). We analyze the PDF using both Einstein and force constant models finding a good agreement between the experimental data and the two models. This indicates that B and Mg atomic correlations are not sensitive to the details of phonon dispersion.

AB - We have studied temperature evolution of the local as well as the average crystal structure of MgB2 using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T=10-600 K. We find small positive correlation factors for the B-B and B-Mg pairs, determined by mean-square displacements (MSD) and the mean-square relative displacements (MSRD). We analyze the PDF using both Einstein and force constant models finding a good agreement between the experimental data and the two models. This indicates that B and Mg atomic correlations are not sensitive to the details of phonon dispersion.

UR - https://www.scopus.com/pages/publications/33745798818

U2 - 10.1140/epjb/e2006-00269-7

DO - 10.1140/epjb/e2006-00269-7

M3 - Article

AN - SCOPUS:33745798818

SN - 1434-6028

VL - 52

SP - 15

EP - 21

JO - Zeitschrift für Physik B Condensed Matter

JF - Zeitschrift für Physik B Condensed Matter

IS - 1

ER -

Study of temperature dependent atomic correlations in MgB₂

Abstract

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