Low temperature magnetic properties of some new high-pressure perovskite phases of iron II: Observation of novel slow paramagnetic relaxation in CaFe2Ti2O6 and CaFe3Ti4O12

W. M. Reiff, Kurt Leinenweber, J. Parise

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Results of iron-57 Moessbauer spectroscopy and ac and dc susceptibility study of the double perovskite phases, CaFeTi2O6 (A) and CaFe3Ti4O12 (B) are presented. Both phases exhibit spectral broadening effects with decreasing temperature and incipient magnetic hyperfine splitting attributable to novel slow paramagnetic relaxation at the tetrahedral and square planar sites of (A) and the square planar sites of (B). The temperature dependence of magnetic moment for (A) corresponds to classical single ion zero field splitting, while that of (B) indicates antiferromagnetic exchange interactions. There is no evidence of cooperative long range magnetic order in these materials.

Original languageEnglish (US)
Pages (from-to)387-392
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume453
StatePublished - Jan 1 1997
Externally publishedYes
EventProceedings of the 1996 MRS Fall Symposium - Boston, MA, USA
Duration: Dec 2 1996Dec 6 1996

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Perovskite
Magnetic properties
iron 57
Iron
magnetic properties
iron
Exchange interactions
Magnetic moments
magnetic moments
Spectroscopy
Ions
magnetic permeability
Temperature
temperature dependence
spectroscopy
ions
interactions
temperature
perovskite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

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title = "Low temperature magnetic properties of some new high-pressure perovskite phases of iron II: Observation of novel slow paramagnetic relaxation in CaFe2Ti2O6 and CaFe3Ti4O12",
abstract = "Results of iron-57 Moessbauer spectroscopy and ac and dc susceptibility study of the double perovskite phases, CaFeTi2O6 (A) and CaFe3Ti4O12 (B) are presented. Both phases exhibit spectral broadening effects with decreasing temperature and incipient magnetic hyperfine splitting attributable to novel slow paramagnetic relaxation at the tetrahedral and square planar sites of (A) and the square planar sites of (B). The temperature dependence of magnetic moment for (A) corresponds to classical single ion zero field splitting, while that of (B) indicates antiferromagnetic exchange interactions. There is no evidence of cooperative long range magnetic order in these materials.",
author = "Reiff, {W. M.} and Kurt Leinenweber and J. Parise",
year = "1997",
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language = "English (US)",
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journal = "Materials Research Society Symposium - Proceedings",
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TY - JOUR

T1 - Low temperature magnetic properties of some new high-pressure perovskite phases of iron II

T2 - Observation of novel slow paramagnetic relaxation in CaFe2Ti2O6 and CaFe3Ti4O12

AU - Reiff, W. M.

AU - Leinenweber, Kurt

AU - Parise, J.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Results of iron-57 Moessbauer spectroscopy and ac and dc susceptibility study of the double perovskite phases, CaFeTi2O6 (A) and CaFe3Ti4O12 (B) are presented. Both phases exhibit spectral broadening effects with decreasing temperature and incipient magnetic hyperfine splitting attributable to novel slow paramagnetic relaxation at the tetrahedral and square planar sites of (A) and the square planar sites of (B). The temperature dependence of magnetic moment for (A) corresponds to classical single ion zero field splitting, while that of (B) indicates antiferromagnetic exchange interactions. There is no evidence of cooperative long range magnetic order in these materials.

AB - Results of iron-57 Moessbauer spectroscopy and ac and dc susceptibility study of the double perovskite phases, CaFeTi2O6 (A) and CaFe3Ti4O12 (B) are presented. Both phases exhibit spectral broadening effects with decreasing temperature and incipient magnetic hyperfine splitting attributable to novel slow paramagnetic relaxation at the tetrahedral and square planar sites of (A) and the square planar sites of (B). The temperature dependence of magnetic moment for (A) corresponds to classical single ion zero field splitting, while that of (B) indicates antiferromagnetic exchange interactions. There is no evidence of cooperative long range magnetic order in these materials.

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M3 - Conference article

AN - SCOPUS:0030646042

VL - 453

SP - 387

EP - 392

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

SN - 0272-9172

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