Magnetic frustration in the site ordered Mg3Fe4(VO4)(6) vanadate

Guskos  N; Likodimos  V; Glenis  SZolnierkiewicz  GTypek  JSzymczak  RBlonska-Tabero  A

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Magnetic frustration in the site ordered Mg3Fe4(VO4)(6) vanadate

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The magnetic properties of the site ordered multicomponent vanadate Mg3Fe4(VO4)(6) are studied using dc magnetization and electron paramagnetic resonance (EPR) measurements. The static susceptibility shows antiferromagnetic interactions between Fe3+ spins with a Curie-Weiss temperature Theta=-111(1) K, while a transition to a spin-glass-like state is observed at T approximate to 8.5 K, indicating appreciable spin frustration. EPR measurements corroborate the presence of antiferromagnetically coupled Fe3+ spins from high temperatures, while a distinct change in the temperature variation of the EPR parameters is observed at T < 80 K, complying with the mean-field energy scale provided by the Curie-Weiss temperature of the system. The resulting magnetic inhomogeneity that persists despite the absence of cation disorder between magnetic and diamagnetic metal ions is attributed to the presence of small amounts of oxygen deficiency that modifies the connectivity and superexchange coupling between Fe3+ spins and leads to a disordered magnetic ground state. (c) 2007 American Institute of Physics.

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《Journal of Applied Physics》 |2007年第10期|3922-1-3922-6-0|共6页
作者
Guskos N; Likodimos V; Glenis SZolnierkiewicz GTypek JSzymczak RBlonska-Tabero A;
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作者单位

Univ Athens, Dept Phys, Sect Solid State Phys, GR-15784 Athens, Greece;

Tech Univ Szczecin, Inst Phys, PL-70310 Szczecin, Poland;

Polish Acad Sci, Inst Phys, PL-02668 Warsaw, PolandInstritut fur Allgemeine Physik, TU Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类应用物理学;
关键词
PARAMAGNETIC-RESONANCE LINEWIDTH; NEUTRON-DIFFRACTION; MAGNETOSTRUCTURAL CORRELATIONS; DISORDERED VANADATE; SPIN-GLASSES; ANTIFERROMAGNETS; EXCHANGE; MODEL; EPR;

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Magnetic frustration in the site ordered Mg3Fe4(VO4)(6) vanadate

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