Magnetic field effects on the soft mode in a singlet ground-state dimer system: a neutron scattering study of Cs3Cr2Br9

Bruno Leuenberger; Hans U. Gudel; Rudolf Feile; Jørgen Kjems

doi:10.1103/PhysRevB.31.597

Magnetic field effects on the soft mode in a singlet ground-state dimer system: a neutron scattering study of Cs3Cr2Br9

Bruno Leuenberger
, Hans U. Gudel
, Rudolf Feile
, Jørgen Kjems

University of Bern

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Neutron scattering experiments in a magnetic field have been performed on the singlet ground-state dimer system Cs3Cr2Br9. At low fields the Zeeman splitting of the soft mode evolves in agreement with the isotropic random-phase approximation (RPA) model, with the notable absence of a quasielastic peak. At a temperature of 1.7K the expected long-range magnetic order is not found at the predicted field of 2.8 T, indicating the shortcomings of the isotropic RPA model in the critical region. Magnetic intensity on the weak nuclear Bragg peak (1¯1¯4) indicates a probable ordering with a ferromagnetic component at 4.5 T and 1.7K

Original language	English
Journal	Physical Review B
Volume	31
Issue number	1
Pages (from-to)	597-599
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.31.597
Publication status	Published - 1985

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title = "Magnetic field effects on the soft mode in a singlet ground-state dimer system: a neutron scattering study of Cs3Cr2Br9",

abstract = "Neutron scattering experiments in a magnetic field have been performed on the singlet ground-state dimer system Cs3Cr2Br9. At low fields the Zeeman splitting of the soft mode evolves in agreement with the isotropic random-phase approximation (RPA) model, with the notable absence of a quasielastic peak. At a temperature of 1.7K the expected long-range magnetic order is not found at the predicted field of 2.8 T, indicating the shortcomings of the isotropic RPA model in the critical region. Magnetic intensity on the weak nuclear Bragg peak (1¯1¯4) indicates a probable ordering with a ferromagnetic component at 4.5 T and 1.7K",

author = "Bruno Leuenberger and Gudel, \{Hans U.\} and Rudolf Feile and J{\o}rgen Kjems",

year = "1985",

doi = "10.1103/PhysRevB.31.597",

language = "English",

volume = "31",

pages = "597--599",

journal = "Physical Review B",

issn = "2469-9950",

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T1 - Magnetic field effects on the soft mode in a singlet ground-state dimer system: a neutron scattering study of Cs3Cr2Br9

AU - Leuenberger, Bruno

AU - Gudel, Hans U.

AU - Feile, Rudolf

AU - Kjems, Jørgen

PY - 1985

Y1 - 1985

N2 - Neutron scattering experiments in a magnetic field have been performed on the singlet ground-state dimer system Cs3Cr2Br9. At low fields the Zeeman splitting of the soft mode evolves in agreement with the isotropic random-phase approximation (RPA) model, with the notable absence of a quasielastic peak. At a temperature of 1.7K the expected long-range magnetic order is not found at the predicted field of 2.8 T, indicating the shortcomings of the isotropic RPA model in the critical region. Magnetic intensity on the weak nuclear Bragg peak (1¯1¯4) indicates a probable ordering with a ferromagnetic component at 4.5 T and 1.7K

AB - Neutron scattering experiments in a magnetic field have been performed on the singlet ground-state dimer system Cs3Cr2Br9. At low fields the Zeeman splitting of the soft mode evolves in agreement with the isotropic random-phase approximation (RPA) model, with the notable absence of a quasielastic peak. At a temperature of 1.7K the expected long-range magnetic order is not found at the predicted field of 2.8 T, indicating the shortcomings of the isotropic RPA model in the critical region. Magnetic intensity on the weak nuclear Bragg peak (1¯1¯4) indicates a probable ordering with a ferromagnetic component at 4.5 T and 1.7K

U2 - 10.1103/PhysRevB.31.597

DO - 10.1103/PhysRevB.31.597

M3 - Journal article

SN - 2469-9950

VL - 31

SP - 597

EP - 599

JO - Physical Review B

JF - Physical Review B

IS - 1

ER -

Magnetic field effects on the soft mode in a singlet ground-state dimer system: a neutron scattering study of Cs3Cr2Br9

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