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Magnetic properties of Ce3+ ion in iron-containing oxypnictide CeFeAsO
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10.1063/1.4801990
/content/aip/journal/ltp/39/4/10.1063/1.4801990
http://aip.metastore.ingenta.com/content/aip/journal/ltp/39/4/10.1063/1.4801990

Figures

Image of FIG. 1.
FIG. 1.

Crystallographic structure of the two phases of non-superconducting CeFeAsO. The coordinate systems xyz and x′y′z′ correspond to the phases P4/nmm and Cmma, respectively.

Image of FIG. 2.
FIG. 2.

Schematic of the experimental and calculated energy levels of Ce3+ ion placed in the coordination complex [Ce(OAs)4]17 . The experimental and theoretically calculated values are denoted with dashed and solid lines, respectively.

Image of FIG. 3.
FIG. 3.

Temperature dependences of the magnetic susceptibility components of Ce3+ ion calculated in external magnetic field μ0 H ex = 5 T. The magnetic susceptibility components are denoted with different symbols: ◼,◻ − χ x , ▲△ − χ y , ●○ − χ z . Open symbols denote the curves calculated in zero internal magnetic field (μ0 H ex = 0 T), filled symbols denote those calculated for μ0 H ex ≠ 0 T. TS  = 158 K is the structural transition point P4/nmmC4mma. The insert shows the dependences C σρ(T) = χσρ (T)T for both phases.

Image of FIG. 4.
FIG. 4.

Calculated and experimental 10 temperature dependences of the magnetic susceptibility. The magnetic susceptibility components are denoted with different symbols: (a) ●○ − χ z ; (b) ◼, ◻ − χ x , ▲△ − χ y . Open symbols denote the dependences calculated in external magnetic field μ0 H ex = 5 T, filled black symbols denote those at μ0 H ex = 1 T. Experimental curves and are shown as solid (μ0 H ex = 1 T) and dashed (μ0 H ex = 5 T) lines.

Image of FIG. 5.
FIG. 5.

Temperature dependence of the fourth-order anisotropy constant K 4 of Ce3+ ion in the phase P4/nmm, calculated using CFT and MCFT (a); positioning of the magnetic moment in the coordination complex of P4/nmm phase (b); positioning of the magnetic moment in the coordination complex of Cmma phase (c).

Tables

Generic image for table
Table I.

Comparison of the experimental 14 and calculated energy levels of Ce3+ ions for non-superconducting CeFeAsO. Doublets are numbered with index i.

Generic image for table
Table II.

ĝ-tensor components for seven doublets obtained using MCFT.

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/content/aip/journal/ltp/39/4/10.1063/1.4801990
2013-04-26
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic properties of Ce3+ ion in iron-containing oxypnictide CeFeAsO
http://aip.metastore.ingenta.com/content/aip/journal/ltp/39/4/10.1063/1.4801990
10.1063/1.4801990
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