Two geometrically frustrated magnets studied by neutron diffraction

I. Mirebeau; A. Apetrei; I. N. Goncharenko; R. Moessner

doi:10.1016/j.physb.2006.05.026

Two geometrically frustrated magnets studied by neutron diffraction

Strongly Correlated Electrons 2009-11-11 v1

Authors: I. Mirebeau , A. Apetrei , I. N. Goncharenko , R. Moessner

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

In the pyrochlore compounds, Tb $_2$ Ti $_2$ O $_7$ and Tb $_2$ Sn $_2$ O $_7$ , only the Tb $^{3+}$ ions are magnetic. They exhibit quite abnormal -- and, in view of their chemical similarity, strikingly different -- magnetic behaviour, as probed by neutron diffraction at ambient and applied pressure. Tb $_2$ Ti $_2$ O $_7$ is a cooperative paramagnet (`spin liquid'), without long range order at ambient pressure; however, it does become ordered under pressure. By contrast, Tb $_2$ Sn $_2$ O $_7$ enters an "ordered spin ice" state already at ambient pressure. We analyse a simple model which already clearly exhibits some of the qualitative features observed experimentally. Overall, comparing these two compounds emphasizes the power of small perturbations in selecting low-temperature states in geometrically frustrated systems.

Keywords

frustrated magnetism magnetic structure perovskite magnetism

Cite

@article{arxiv.cond-mat/0602384,
  title  = {Two geometrically frustrated magnets studied by neutron diffraction},
  author = {I. Mirebeau and A. Apetrei and I. N. Goncharenko and R. Moessner},
  journal= {arXiv preprint arXiv:cond-mat/0602384},
  year   = {2009}
}

Comments

6 pages, 4 figures, International Conference on Neutron Scattering Sydney(2005)

Two geometrically frustrated magnets studied by neutron diffraction

Abstract

Keywords

Cite

Comments

Related papers