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. 2023 Aug 29;35(47).
doi: 10.1088/1361-648X/aceede.

Evolution of magnetic surfboards and spin glass behavior in (Fe1- pGa p)2TiO5

Y Li  1 , D Phelan  1 , F Ye  2 , H Zheng  1 , E Krivyakina  1   3 , A Samarakoon  1 , P G LaBarre  4 , J Neu  5   6 , T Siegrist  5   7 , S Rosenkranz  1 , S V Syzranov  4 , A P Ramirez  4
Affiliations

Evolution of magnetic surfboards and spin glass behavior in (Fe1- pGa p)2TiO5

Y Li et al. J Phys Condens Matter. .

Abstract

The unusual anisotropy of the spin glass (SG) transition in the pseudobrookite system Fe2TiO5has been interpreted as arising from an induced, van der Waals-like, interaction among magnetic clusters. Here we present susceptibility (χ) and specific heat data (C) for Fe2TiO5diluted with non-magnetic Ga, (Fe1-pGap)2TiO5, for disorder parameterp= 0, 0.11, and 0.42, and elastic neutron scattering data forp= 0.20. A uniform suppression ofTgis observed upon increasingp, along with a value ofχTgthat increases asTgdecreases, i.e.dχ(Tg)/dTg<0We also observeCT∝T2in the low temperature limit. The observed behavior places (Fe1-pGap)2TiO5in the category of a strongly geometrically frustrated SG.

Keywords: anisotropic spin glasses; geometric frustration; neutron scattering.

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