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The spin ice Ho(2)Ti(2)O(7) versus the spin liquid Tb(2)Ti(2)O(7): field-induced magnetic structures.

A P Sazonov¹, A Gukasov, I Mirebeau

¹CEA, Centre de Saclay, DSM/IRAMIS/Laboratoire L´eon Brillouin, F-91191 Gif-sur-Yvette, France. andrew.sazonov@cea.fr

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|April 8, 2011

Summary

This summary is machine-generated.

We investigated magnetic structures in Ho(2)Ti(2)O(7) spin ice and Tb(2)Ti(2)O(7) spin liquid using neutron diffraction. Both materials exhibit two coexisting magnetic structures under high magnetic fields, differing in their irreducible representations.

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Area of Science:

Condensed Matter Physics
Magnetism
Crystallography

Background:

Spin ice materials like Ho(2)Ti(2)O(7) and Tb(2)Ti(2)O(7) exhibit complex magnetic behaviors.
Understanding field-induced magnetic structures is crucial for characterizing these frustrated magnetic systems.

Purpose of the Study:

To determine the field-induced magnetic structures of Ho(2)Ti(2)O(7) spin ice.
To compare these structures with those of Tb(2)Ti(2)O(7) spin liquid under identical conditions.

Main Methods:

Single-crystal neutron diffraction was employed.
A magnetic field was applied along the [110] crystallographic direction.
Experiments were conducted at low temperature (1.6 K) and high field (7 T).

Main Results:

Both Ho(2)Ti(2)O(7) and Tb(2)Ti(2)O(7) show coexistence of two magnetic structure types with k = 0 and k = (0, 0, 1) propagation vectors.
The k = 0 structures share the same irreducible representation for both compounds.
The k = (0, 0, 1) structures correspond to different irreducible representations for Ho(2)Ti(2)O(7) and Tb(2)Ti(2)O(7).

Conclusions:

The study reveals distinct field-induced magnetic structures in Ho(2)Ti(2)O(7) and Tb(2)Ti(2)O(7) despite similarities in their k=0 structures.
The differences in the k = (0, 0, 1) structures highlight unique magnetic ordering behaviors in these related materials.