Pressure driven collapse of the magnetism in the Kondo insulator UNiSn

A. Barla; J. P. Sanchez; A. Aksungur; R. Lengsdorf; J. Plessel; B. P. Doyle; R. Rüffer; T. Takabatake; M. M. Abd-Elmeguid

doi:10.1103/PhysRevB.71.020402

Pressure driven collapse of the magnetism in the Kondo insulator UNiSn

A. Barla, J. P. Sanchez, A. Aksungur, R. Lengsdorf, J. Plessel, B. P. Doyle, R. Rüffer, T. Takabatake, M. M. Abd-Elmeguid

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

1 Citation (Scopus)

Abstract

The effect of pressure on the electronic and magnetic properties of the antiferromagnetic (T _N∼43 K) narrow gap semiconductor UNiSn has been investigated by ¹¹⁹Sn Mössbauer spectroscopy and nuclear forward scattering of synchrotron radiation, electrical resistance, and x-ray diffraction. We show that the decrease of the semiconducting gap which leads to a metallic state at p∼9 GPa is associated with an enhancement of T _N. At higher pressures, both TN and the transferred magnetic hyperfine field decrease, with a collapse of magnetism at ∼18.5 GPa. The results are explained by a volume-dependent competition between indirect Ruderman-Kittel-Kasuya-Yosida interaction and the 5f-ligand hybridization.

Original language	English
Article number	020402
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.71.020402
Publication status	Published - Jan 2005
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.71.020402

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title = "Pressure driven collapse of the magnetism in the Kondo insulator UNiSn",

abstract = "The effect of pressure on the electronic and magnetic properties of the antiferromagnetic (T N∼43 K) narrow gap semiconductor UNiSn has been investigated by 119Sn M{\"o}ssbauer spectroscopy and nuclear forward scattering of synchrotron radiation, electrical resistance, and x-ray diffraction. We show that the decrease of the semiconducting gap which leads to a metallic state at p∼9 GPa is associated with an enhancement of T N. At higher pressures, both TN and the transferred magnetic hyperfine field decrease, with a collapse of magnetism at ∼18.5 GPa. The results are explained by a volume-dependent competition between indirect Ruderman-Kittel-Kasuya-Yosida interaction and the 5f-ligand hybridization.",

author = "A. Barla and Sanchez, {J. P.} and A. Aksungur and R. Lengsdorf and J. Plessel and Doyle, {B. P.} and R. R{\"u}ffer and T. Takabatake and Abd-Elmeguid, {M. M.}",

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doi = "10.1103/PhysRevB.71.020402",

language = "English",

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T1 - Pressure driven collapse of the magnetism in the Kondo insulator UNiSn

AU - Barla, A.

AU - Sanchez, J. P.

AU - Aksungur, A.

AU - Lengsdorf, R.

AU - Plessel, J.

AU - Doyle, B. P.

AU - Rüffer, R.

AU - Takabatake, T.

AU - Abd-Elmeguid, M. M.

PY - 2005/1

Y1 - 2005/1

N2 - The effect of pressure on the electronic and magnetic properties of the antiferromagnetic (T N∼43 K) narrow gap semiconductor UNiSn has been investigated by 119Sn Mössbauer spectroscopy and nuclear forward scattering of synchrotron radiation, electrical resistance, and x-ray diffraction. We show that the decrease of the semiconducting gap which leads to a metallic state at p∼9 GPa is associated with an enhancement of T N. At higher pressures, both TN and the transferred magnetic hyperfine field decrease, with a collapse of magnetism at ∼18.5 GPa. The results are explained by a volume-dependent competition between indirect Ruderman-Kittel-Kasuya-Yosida interaction and the 5f-ligand hybridization.

AB - The effect of pressure on the electronic and magnetic properties of the antiferromagnetic (T N∼43 K) narrow gap semiconductor UNiSn has been investigated by 119Sn Mössbauer spectroscopy and nuclear forward scattering of synchrotron radiation, electrical resistance, and x-ray diffraction. We show that the decrease of the semiconducting gap which leads to a metallic state at p∼9 GPa is associated with an enhancement of T N. At higher pressures, both TN and the transferred magnetic hyperfine field decrease, with a collapse of magnetism at ∼18.5 GPa. The results are explained by a volume-dependent competition between indirect Ruderman-Kittel-Kasuya-Yosida interaction and the 5f-ligand hybridization.

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DO - 10.1103/PhysRevB.71.020402

M3 - Article

AN - SCOPUS:17044392537

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VL - 71

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 2

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ER -

Pressure driven collapse of the magnetism in the Kondo insulator UNiSn

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