Phase inhomogeneities and lattice expansion near Tc in the Mg11B2 superconductor

S. Margadonna; T. Muranaka; K. Prassides; I. Maurin; K. Brigatti; R. M. Ibberson; M. Arai; M. Takata; J. Akimitsu

doi:10.1088/0953-8984/13/35/101

Phase inhomogeneities and lattice expansion near T_c in the Mg¹¹B₂ superconductor

S. Margadonna
, T. Muranaka
, K. Prassides
, I. Maurin
, K. Brigatti
, R. M. Ibberson
, M. Arai
, M. Takata
, J. Akimitsu

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

30 Scopus citations

Abstract

High-resolution powder neutron diffraction has been used to study the crystal structure of the Mg¹¹B₂ superconductor (T_c = 39.2 K) prepared at high pressure in the temperature range 2 to 293 K. The experimental data provide clear evidence of temperature-independent phase inhomogeneity, which was modelled by coexisting Mg_1+δB₂ phases. Precise structural information for temperatures near T_c also reveals extremely small volume and c-axis discontinuities, consistent with the existence of a specific heat anomaly at T_c.

Original language	English
Pages (from-to)	L795-L802
Journal	Journal of Physics Condensed Matter
Volume	13
Issue number	35
DOIs	https://doi.org/10.1088/0953-8984/13/35/101
State	Published - Sep 3 2001
Externally published	Yes

Access to Document

10.1088/0953-8984/13/35/101

Cite this

@article{5a63df3fe9564c19bca7c2faf2a91ba4,

title = "Phase inhomogeneities and lattice expansion near Tc in the Mg11B2 superconductor",

abstract = "High-resolution powder neutron diffraction has been used to study the crystal structure of the Mg11B2 superconductor (Tc = 39.2 K) prepared at high pressure in the temperature range 2 to 293 K. The experimental data provide clear evidence of temperature-independent phase inhomogeneity, which was modelled by coexisting Mg1+δB2 phases. Precise structural information for temperatures near Tc also reveals extremely small volume and c-axis discontinuities, consistent with the existence of a specific heat anomaly at Tc.",

author = "S. Margadonna and T. Muranaka and K. Prassides and I. Maurin and K. Brigatti and Ibberson, \{R. M.\} and M. Arai and M. Takata and J. Akimitsu",

year = "2001",

month = sep,

day = "3",

doi = "10.1088/0953-8984/13/35/101",

language = "English",

volume = "13",

pages = "L795--L802",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

publisher = "IOP Publishing",

number = "35",

}

TY - JOUR

T1 - Phase inhomogeneities and lattice expansion near Tc in the Mg11B2 superconductor

AU - Margadonna, S.

AU - Muranaka, T.

AU - Prassides, K.

AU - Maurin, I.

AU - Brigatti, K.

AU - Ibberson, R. M.

AU - Arai, M.

AU - Takata, M.

AU - Akimitsu, J.

PY - 2001/9/3

Y1 - 2001/9/3

N2 - High-resolution powder neutron diffraction has been used to study the crystal structure of the Mg11B2 superconductor (Tc = 39.2 K) prepared at high pressure in the temperature range 2 to 293 K. The experimental data provide clear evidence of temperature-independent phase inhomogeneity, which was modelled by coexisting Mg1+δB2 phases. Precise structural information for temperatures near Tc also reveals extremely small volume and c-axis discontinuities, consistent with the existence of a specific heat anomaly at Tc.

AB - High-resolution powder neutron diffraction has been used to study the crystal structure of the Mg11B2 superconductor (Tc = 39.2 K) prepared at high pressure in the temperature range 2 to 293 K. The experimental data provide clear evidence of temperature-independent phase inhomogeneity, which was modelled by coexisting Mg1+δB2 phases. Precise structural information for temperatures near Tc also reveals extremely small volume and c-axis discontinuities, consistent with the existence of a specific heat anomaly at Tc.

UR - https://www.scopus.com/pages/publications/0035801194

U2 - 10.1088/0953-8984/13/35/101

DO - 10.1088/0953-8984/13/35/101

M3 - Article

AN - SCOPUS:0035801194

SN - 0953-8984

VL - 13

SP - L795-L802

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 35

ER -

Phase inhomogeneities and lattice expansion near T_c in the Mg¹¹B₂ superconductor

Abstract

Access to Document

Other files and links

Fingerprint

Cite this