Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms

Furrer, A.; Podlesnyak, A.; Krämer, K. W.; Strässle, Th.

doi:10.1103/PhysRevB.90.144434

Title: Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms

Abstract

Inelastic neutron scattering experiments were performed to study manganese(II) dimer excitations in the diluted one-, two-, and three-dimensional compounds CsMn_xMg_1-xBr₃, K₂Mn_xZn_1-xF₄, and KMn_xZn_1-xF₃ (x≤0.10), respectively. The transitions from the ground-state singlet to the excited triplet, split into a doublet and a singlet due to the single-ion anisotropy, exhibit remarkable fine structures. These unusual features are attributed to local structural inhomogeneities induced by the dopant Mn atoms which act like lattice defects. Statistical models support the theoretically predicted decay of atomic displacements according to 1/r², 1/r, and constant (for three-, two-, and one-dimensional compounds, respectively) where r denotes the distance of the displaced atoms from the defect. In conclusion, the observed fine structures allow a direct determination of the local exchange interactions J, and the local intradimer distances R can be derived through the linear law dJ/dR.

Authors:

Furrer, A. ^[1]; Podlesnyak, A. ^[2]; Krämer, K. W. ^[3]; Strässle, Th. ^[1]

Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering and Imaging
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
Univ. of Bern, Bern (Switzerland)

Publication Date:: 2014-10-29

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States) Spallation Neutron Source

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1163590

Alternate Identifier(s):: OSTI ID: 1180220

Grant/Contract Number:: AC05-00OR22725; AC05.00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 90; Journal Issue: 14; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Furrer, A., Podlesnyak, A., Krämer, K. W., and Strässle, Th. Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms.  United States: N. p., 2014. 
Web.  doi:10.1103/PhysRevB.90.144434.

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                    Furrer, A., Podlesnyak, A., Krämer, K. W., & Strässle, Th. Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms.  United States.  https://doi.org/10.1103/PhysRevB.90.144434

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                    Furrer, A., Podlesnyak, A., Krämer, K. W., and Strässle, Th. Wed .  
"Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms".  United States.  https://doi.org/10.1103/PhysRevB.90.144434.  https://www.osti.gov/servlets/purl/1163590.

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@article{osti_1163590,

  title        = {Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms},

  author       = {Furrer, A. and Podlesnyak, A. and Krämer, K. W. and Strässle, Th.},

  abstractNote = {Inelastic neutron scattering experiments were performed to study manganese(II) dimer excitations in the diluted one-, two-, and three-dimensional compounds CsMnxMg1-xBr3, K2MnxZn1-xF4, and KMnxZn1-xF3 (x≤0.10), respectively. The transitions from the ground-state singlet to the excited triplet, split into a doublet and a singlet due to the single-ion anisotropy, exhibit remarkable fine structures. These unusual features are attributed to local structural inhomogeneities induced by the dopant Mn atoms which act like lattice defects. Statistical models support the theoretically predicted decay of atomic displacements according to 1/r2, 1/r, and constant (for three-, two-, and one-dimensional compounds, respectively) where r denotes the distance of the displaced atoms from the defect. In conclusion, the observed fine structures allow a direct determination of the local exchange interactions J, and the local intradimer distances R can be derived through the linear law dJ/dR.},

  doi          = {10.1103/PhysRevB.90.144434},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 14,

  volume       = 90,

  place        = {United States},

  year         = {2014},

  month        = {10}

}

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Works referenced in this record:

Single-ion versus two-ion anisotropy in magnetic compounds: A neutron scattering study
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Furrer, A.; Juranyi, F.; Krämer, K. W.
Physical Review B, Vol. 83, Issue 2
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Furrer, A.; Podlesnyak, A.; Krämer, K. W.
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Alloul, H.; Bobroff, J.; Gabay, M.
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Shannon, R. D.
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Origin of Higher Order Magnetic Exchange: Evidence for Local Dimer Exchange Striction in ${CsMn}_{0.28} {Mg}_{0.72} {Br}_{3}$ Probed by Inelastic Neutron Scattering
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Strässle, Th.; Juranyi, F.; Schneider, M.
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Bobroff, J.; Laflorencie, N.; Alexander, L. K.
Physical Review Letters, Vol. 103, Issue 4
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Direct Observation of Local Mn-Mn Distances in the Paramagnetic Compound ${CsMn}_{x} {Mg}_{1 - x} {Br}_{3}$
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Furrer, A.; Strässle, Th.; Embs, J. P.
Physical Review Letters, Vol. 107, Issue 11
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Title: Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms

Abstract

Citation Formats

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