Temperature-field phase diagram of quantum critical CeAuSb2

K. A. Lorenzer; A. M. Strydom; A. Thamizhavel; S. Paschen

doi:10.1002/pssb.201200783

Temperature-field phase diagram of quantum critical CeAuSb₂

K. A. Lorenzer, A. M. Strydom, A. Thamizhavel, S. Paschen

Physics

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

9 Citations (Scopus)

Abstract

CeAuSb₂ has previously been classified as an antiferromagnet with moderately enhanced electron masses. As the magnetic order is suppressed by a magnetic field, non-Fermi liquid behaviour has been shown to emerge, suggesting the presence of a quantum critical point (QCP). Within the ordered phase a metamagnetic transition was detected. Here we investigate the material by isothermal magnetization M(H), transverse magnetoresistivity ρ_t(H) and Hall resistivity ρ_H(H) measurements. We show that the metamagnetic transition splits into two first order transitions below 2K. Pronounced anomalies in ρ_t(H) and ρ_H(H) are not only observed at the QCP and the metamagnetic transitions but also at a new characteristic field above the QCP.

Original language	English
Pages (from-to)	464-467
Number of pages	4
Journal	Physica Status Solidi (B): Basic Research
Volume	250
Issue number	3
DOIs	https://doi.org/10.1002/pssb.201200783
Publication status	Published - Mar 2013

Keywords

Hall effect
Kondo lattice
Metamagnetism
Resistivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1002/pssb.201200783

Cite this

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abstract = "CeAuSb2 has previously been classified as an antiferromagnet with moderately enhanced electron masses. As the magnetic order is suppressed by a magnetic field, non-Fermi liquid behaviour has been shown to emerge, suggesting the presence of a quantum critical point (QCP). Within the ordered phase a metamagnetic transition was detected. Here we investigate the material by isothermal magnetization M(H), transverse magnetoresistivity ρt(H) and Hall resistivity ρH(H) measurements. We show that the metamagnetic transition splits into two first order transitions below 2K. Pronounced anomalies in ρt(H) and ρH(H) are not only observed at the QCP and the metamagnetic transitions but also at a new characteristic field above the QCP.",

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T1 - Temperature-field phase diagram of quantum critical CeAuSb2

AU - Lorenzer, K. A.

AU - Strydom, A. M.

AU - Thamizhavel, A.

AU - Paschen, S.

PY - 2013/3

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AB - CeAuSb2 has previously been classified as an antiferromagnet with moderately enhanced electron masses. As the magnetic order is suppressed by a magnetic field, non-Fermi liquid behaviour has been shown to emerge, suggesting the presence of a quantum critical point (QCP). Within the ordered phase a metamagnetic transition was detected. Here we investigate the material by isothermal magnetization M(H), transverse magnetoresistivity ρt(H) and Hall resistivity ρH(H) measurements. We show that the metamagnetic transition splits into two first order transitions below 2K. Pronounced anomalies in ρt(H) and ρH(H) are not only observed at the QCP and the metamagnetic transitions but also at a new characteristic field above the QCP.

KW - Hall effect

KW - Kondo lattice

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