Understanding complex magnetic order in disordered cobalt hydroxides through analysis of the local structure

James R. Neilson, Daniel E. Morse, Brent C. Melot, Daniel P. Shoemaker, Joshua A. Kurzman, Ram Seshadri

Research output: Contribution to journalArticlepeer-review

Abstract

In many ostensibly crystalline materials, unit-cell-based descriptions do not always capture the complete physics of the system due to disruption in long-range order. In the series of cobalt hydroxides studied here, Co(OH) 2-x(Cl)x(H2O)n, magnetic Bragg diffraction reveals a fully compensated Néel state, yet the materials show significant and open magnetization loops. A detailed analysis of the local structure defines the aperiodic arrangement of cobalt coordination polyhedra. Representation of the structure as a combination of distinct polyhedral motifs explains the existence of locally uncompensated moments and provides a quantitative agreement with bulk magnetic measurements and magnetic Bragg diffraction.

Original languageEnglish (US)
Article number094418
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number9
DOIs
StatePublished - Mar 16 2011
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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