A Spin Glass State in Ba3TiRu2O9
Loi T. Nguyen, R.J. Cava
TL;DR
This paper investigates the magnetic and electronic properties of Ba3TiRu2O9, revealing it as a chemically disordered spin-glass semiconductor with unique magnetic behavior and charge transport characteristics.
Contribution
It reports the first detailed study of Ba3TiRu2O9's magnetic disorder and spin-glass state, linking structural disorder to magnetic and electronic properties.
Findings
Displays spin-glass behavior below 4.7 K.
Has a Weiss temperature of -29.5 K indicating antiferromagnetic interactions.
Is a semiconductor with an activation energy of 0.14 eV.
Abstract
The magnetic properties of Ba3TiRu2O9 , whose crystal structure is based on stacked triangular planar lattices of MO6 dimers and single MO6 octahedra, are reported. The system is magnetically disturbed by a substantial amount of Ti/Ru chemical disorder. The Weiss temperature and effective magnetic moment were found to be -29.5 K and 1.82 {\mu}B/f.u. respectively, and a bifurcation in the zero field cooled and field cooled magnetic susceptibility is observed below 4.7 K, suggesting that this is a compositionally-disordered spin-glass system. The material is a semiconductor with an activation energy for charge transport of approximately 0.14 eV.
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