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The pyrochlore oxide: Magnetic structure versus magnetic frustration
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Image of FIG. 1.
FIG. 1.

XRD pattern of , indexed in a cubic unit cell with parameter .

Image of FIG. 2.
FIG. 2.

Comparison of the observed (crosses), calculated (solid line), and difference (at the bottom) NPD patterns. (a) . The two series of tick marks correspond to the positions of the allowed Bragg reflections for the main phase and vanadium. (b) . The third series of tick marks corresponds to the magnetic reflections.

Image of FIG. 3.
FIG. 3.

Thermal evolution of the FC and ZFC dc susceptibility. Upper inset: reciprocal susceptibility (FC data).

Image of FIG. 4.
FIG. 4.

Magnetization vs magnetic field isotherms at , 10, and 30 K.

Image of FIG. 5.
FIG. 5.

Thermal evolution of the real an imaginary part of the ac susceptiblity.

Image of FIG. 6.
FIG. 6.

Thermal evolution of the NPD patterns measured at 2, 10, 50, and 300 K.

Image of FIG. 7.
FIG. 7.

View of the crystallographic structure of showing (a) the rings of octahedra sharing corners and (b) Ho cations eightfold coordinated with oxygens (scalenohedra or distorted cubes).


Generic image for table
Table I.

Unit-cell, positional, thermal parameters, and ordered magnetic moments for in cubic (no. 227) space group, from NPD data at 295, 50, 10, and 2K. Ho are placed at (1/2, 1/2, 1/2), Mn/Ru at (0, 0, 0), O1 at (x, 1/8, 1/8), O2 at (3/8, 3/8, 3/8) positions.

Generic image for table
Table II.

Selected atomic distances (Å) and angles (deg) for at 295, 50, 10, and 2K.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The Ho2MnRuO7 pyrochlore oxide: Magnetic structure versus magnetic frustration