Fluctuations of pair correlations and the spin glass transition in amorphous Al2Mn3Si3O12期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Fluctuations of pair correlations and the spin glass transition in amorphous Al2Mn3Si3O12

Authors:	Nägele W.

Affiliation:	(1) Institut für Kristallographie der Universität, Tübingen, Federal Republic of Germany;(2) Present address: Kernforschungszentrum Karisruhe GmbH Abt. Kerntechnische Betriebe/Heiße Zellen, Postfach 3640, D-7500 Karlsruhe 1, FRG

Abstract:	The time fluctuations of the pair correlations in the amorphous spin glass Al₂Mn₃Si₃O₁₂ were investigated by quasi-elastic neutron scattering. Their time constant follows an Arrhenius law $tau = tau _infty e^{E_a /k_B T}$ from room temperature down to below the spin glass temperatureT_f. No static component of the pair correlation was found. It is shown that an Arrhenius law can qualitatively account for all the phenomena associated with the ac susceptibility as a function of temperature, ac frequency and applied dc magnetic field.Dedicated to Professor Jagodzinski on the occasion of his 65th birthday

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