Low energy spin dynamics in the spin ice Ho2Sn2O7

The magnetic properties of Ho2Sn2O7 have been investigated and compared to other spin ice compounds. Although the lattice has expanded by 3% relative to the better studied Ho2Ti2O7 spin ice, no significant changes were observed in the high temperature properties, T 20 K. As the temperature is lowere...

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Veröffentlicht in:	Journal of physics. Condensed matter 2012-02, Vol.24 (7), p.076005-16
Hauptverfasser:	Ehlers, G, Huq, A, Diallo, S O, Adriano, C, Rule, K C, Cornelius, A L, Fouquet, P, Pagliuso, P G, Gardner, J S
Format:	Artikel
Sprache:	eng
Schlagworte:	ANTIFERROMAGNETISM Condensed matter CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology HOLMIUM HOLMIUM OXIDES HYPERFINE STRUCTURE Lattices MAGNETIC PROPERTIES Magnetic properties and materials Nuclear spin Physics SPIN Spin dynamics Spin glasses and other random magnets Spin ice Studies of specific magnetic materials TEMPERATURE RANGE 0000-0013 K TEMPERATURE RANGE 0013-0065 K TEMPERATURE RANGE 0065-0273 K TIN OXIDES
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Zusammenfassung:	The magnetic properties of Ho2Sn2O7 have been investigated and compared to other spin ice compounds. Although the lattice has expanded by 3% relative to the better studied Ho2Ti2O7 spin ice, no significant changes were observed in the high temperature properties, T 20 K. As the temperature is lowered and correlations develop, Ho2Sn2O7 enters its quantum phase at a slightly higher temperature than Ho2Ti2O7 and is more antiferromagnetic in character. Below 80 K a weak inelastic mode associated with the holmium nuclear spin system has been measured. The hyperfine field at the holmium nucleus was found to be 700 T.
ISSN:	0953-8984 1361-648X
DOI:	10.1088/0953-8984/24/7/076005