Magnetic properties of the garnet and glass forms of Mn3Al2Si3O12

被引：22
|
作者：
Lau, G. C. [1 ]
Klimczuk, T. [2 ,3 ]
Ronning, F. [2 ]
McQueen, T. M. [1 ]
Cava, R. J. [1 ]
机构：
[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 21期
基金：
美国国家科学基金会;
关键词：
aluminium compounds; frustration; garnets; magnetic susceptibility; manganese compounds; specific heat; vitrification; ATOMIC DISPLACEMENT PARAMETERS; SPESSARTINE MN3AL2SI3O12; CRYSTAL-CHEMISTRY; SPIN-GLASS;
D O I：
10.1103/PhysRevB.80.214414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 Mn2+ (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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页数：5
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