The Geometrically Frustrated Spin Glass (Fe1-pGap)2TiO5

Y. Li; D. Phelan; F. Ye; H. Zheng; E. Krivyakina; A. Samarakoon; P. G. LaBarre; J. Neu; T. Siegrist; S. Rosenkranz; S. V. Syzranov; A. P. Ramirez

arXiv · 2207.06354

The Geometrically Frustrated Spin Glass (Fe1-pGap)2TiO5

Y. Li·D. Phelan·F. Ye·H. Zheng·E. Krivyakina·A. Samarakoon·P. G. LaBarre·J. Neu·T. Siegrist·S. Rosenkranz·S. V. Syzranov·A. P. Ramirez

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Abstract

The unusual anisotropy of the spin glass transition in the pseudobrookite system Fe$_2$TiO$_5$ has been interpreted as arising from an induced, van der Waals-like, interaction among magnetic clusters. Here we present susceptibility ($\chi$) and specific heat data (C) for Fe2TiO5 diluted with non-magnetic Ga, (Fe$_{1-p}$Ga$_p$)$_2$TiO$_5$, for disorder parameter p = 0, 0.11, and 0.42, and elastic neutron scattering data for p = 0.20. A uniform suppression of T{_g} is observed upon increasing p, along with a value of $\chi (T_g)$ that increases as T$_g$ decreases, i.e. $d\chi(T_g)/dT_g< 0$. We also observe C(T) $\propto$ T$^2$ in the low temperature limit. The observed behavior places (Fe$_{1-p}$Ga$_p$)$_2$TiO$_5$ in the category of a strongly geometrically frustrated spin glass.

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Y. Li, D. Phelan, F. Ye, H. Zheng, E. Krivyakina, A. Samarakoon, P. G. LaBarre, J. Neu, T. Siegrist, S. Rosenkranz, S. V. Syzranov, A. P. Ramirez. 2022-07-13. The Geometrically Frustrated Spin Glass (Fe1-pGap)2TiO5. https://arxiv.org/abs/2207.06354

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