The magnetic properties of the Garnet and glass forms of Mn3Al2Si3O12
G.C. Lau, T. Klimczuk, F. Ronning, T.M. McQueen, and R.J. Cava
TL;DR
This study compares the magnetic properties of crystalline garnet and glass forms of Mn3Al2Si3O12, revealing that the glass form exhibits stronger magnetic frustration and providing insights into specific heat anomalies.
Contribution
It provides the first direct comparison of magnetic frustration in garnet and glass forms of Mn3Al2Si3O12 at the same composition.
Findings
Glass phase shows more magnetic frustration than crystalline phase.
Specific heat comparison reveals anomalous behavior in Mn3Al2Si3O12.
Insights into magnetic and thermal properties of garnet and glass forms.
Abstract
The magnetic susceptibilities and specific heats of the crystalline garnet and glass forms of Mn3Al2Si3O12 are reported. This allows a direct comparison of the degree of magnetic frustration of the triangle-based garnet lattice and the structurally disordered solid at the same composition for isotropic spin 5/2 Mn^2+ (3d^5). The results show that the glass phase shows more pronounced signs of magnetic frustration than the crystalline phase. Through comparison of the specific heats of Ca3Al2Si3O12 (grossular) and Mn3Al2Si3O12 (spessartine) garnets, information is provided concerning the anomalous extra specific heat in the latter material.
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