Magnetic ordering in the compounds RbFeCl3·2H2O and CsFeCl3·2H2O

H.Th. Le Fever; R.C. Thiel; W.J. Huiskamp; W.J.M. de Jonge; A.M. van der Kraan

doi:10.1016/0378-4363(81)90098-X

Magnetic ordering in the compounds RbFeCl₃·2H₂O and CsFeCl₃·2H₂O

H.Th. Le Fever, R.C. Thiel, W.J. Huiskamp, W.J.M. de Jonge, A.M. van der Kraan

Applied Physics and Science Education

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

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Abstract

Mössbauer experiments have been performed in the magnetically ordered phase of RbFeCl₃·2H₂O and CsFeCl₃·2H₂O. Magnetic ordering is observed in both compounds, which are reported to show low-dimensional interactions. The observed temperature dependence of the hyperfine field of RbFeCl₃·2H₂O fits well to the S′ = 1 2 rectangular Ising model, with exchange constants |J₁/k| = 50±7 K and |J₂/k| = 0.40±0.25 K, and T_N = 12.08±0.06 K. The low-temperature orientation of the hyperfine field of RbFeCl₃·2H₂O has been determined by measurements on a single-crystal absorber in an applied field. The hyperfine field is oriented parallel to the a axis, which deviates slightly from the earlier reported magnetic moment direction at 16° to the a axis. This deviation is attributed to the dipolar contribution in the hyperfine field. The low value of the saturation hyperfine field (-7.5T for RbFeCl₃·2H₂O) and the relative importance of the dipolar contribution are discussed in relation to the crystal field effects of a tetragonally distorted octahedron.

Original language	English
Pages (from-to)	209-218
Number of pages	10
Journal	Physica B+C
Volume	111
Issue number	2-3
DOIs	https://doi.org/10.1016/0378-4363(81)90098-X
Publication status	Published - 1981

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title = "Magnetic ordering in the compounds RbFeCl3·2H2O and CsFeCl3·2H2O",

abstract = "M{\"o}ssbauer experiments have been performed in the magnetically ordered phase of RbFeCl3·2H2O and CsFeCl3·2H2O. Magnetic ordering is observed in both compounds, which are reported to show low-dimensional interactions. The observed temperature dependence of the hyperfine field of RbFeCl3·2H2O fits well to the S′ = 1 2 rectangular Ising model, with exchange constants |J1/k| = 50±7 K and |J2/k| = 0.40±0.25 K, and TN = 12.08±0.06 K. The low-temperature orientation of the hyperfine field of RbFeCl3·2H2O has been determined by measurements on a single-crystal absorber in an applied field. The hyperfine field is oriented parallel to the a axis, which deviates slightly from the earlier reported magnetic moment direction at 16° to the a axis. This deviation is attributed to the dipolar contribution in the hyperfine field. The low value of the saturation hyperfine field (-7.5T for RbFeCl3·2H2O) and the relative importance of the dipolar contribution are discussed in relation to the crystal field effects of a tetragonally distorted octahedron.",

author = "{Le Fever}, H.Th. and R.C. Thiel and W.J. Huiskamp and {de Jonge}, W.J.M. and {van der Kraan}, A.M.",

year = "1981",

doi = "10.1016/0378-4363(81)90098-X",

language = "English",

volume = "111",

pages = "209--218",

journal = "Physica B+C",

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T1 - Magnetic ordering in the compounds RbFeCl3·2H2O and CsFeCl3·2H2O

AU - Le Fever, H.Th.

AU - Thiel, R.C.

AU - Huiskamp, W.J.

AU - de Jonge, W.J.M.

AU - van der Kraan, A.M.

PY - 1981

Y1 - 1981

N2 - Mössbauer experiments have been performed in the magnetically ordered phase of RbFeCl3·2H2O and CsFeCl3·2H2O. Magnetic ordering is observed in both compounds, which are reported to show low-dimensional interactions. The observed temperature dependence of the hyperfine field of RbFeCl3·2H2O fits well to the S′ = 1 2 rectangular Ising model, with exchange constants |J1/k| = 50±7 K and |J2/k| = 0.40±0.25 K, and TN = 12.08±0.06 K. The low-temperature orientation of the hyperfine field of RbFeCl3·2H2O has been determined by measurements on a single-crystal absorber in an applied field. The hyperfine field is oriented parallel to the a axis, which deviates slightly from the earlier reported magnetic moment direction at 16° to the a axis. This deviation is attributed to the dipolar contribution in the hyperfine field. The low value of the saturation hyperfine field (-7.5T for RbFeCl3·2H2O) and the relative importance of the dipolar contribution are discussed in relation to the crystal field effects of a tetragonally distorted octahedron.

AB - Mössbauer experiments have been performed in the magnetically ordered phase of RbFeCl3·2H2O and CsFeCl3·2H2O. Magnetic ordering is observed in both compounds, which are reported to show low-dimensional interactions. The observed temperature dependence of the hyperfine field of RbFeCl3·2H2O fits well to the S′ = 1 2 rectangular Ising model, with exchange constants |J1/k| = 50±7 K and |J2/k| = 0.40±0.25 K, and TN = 12.08±0.06 K. The low-temperature orientation of the hyperfine field of RbFeCl3·2H2O has been determined by measurements on a single-crystal absorber in an applied field. The hyperfine field is oriented parallel to the a axis, which deviates slightly from the earlier reported magnetic moment direction at 16° to the a axis. This deviation is attributed to the dipolar contribution in the hyperfine field. The low value of the saturation hyperfine field (-7.5T for RbFeCl3·2H2O) and the relative importance of the dipolar contribution are discussed in relation to the crystal field effects of a tetragonally distorted octahedron.

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DO - 10.1016/0378-4363(81)90098-X

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ER -

Magnetic ordering in the compounds RbFeCl₃·2H₂O and CsFeCl₃·2H₂O

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