Abstract
The Mn3Sb metastable compound is formed at high pressure and temperature and it decomposes upon heating above 420 K into Mn2Sb and Mn. It has a cubic crystalline structure describing the Pm-3m (№ 221) space group with a lattice parameter of a = 0.400 nm. In the present work, according to the results of neutron diffraction investigations and taking into account magnetometry data, it is shown that Mn3Sb is an antiferromagnet, and a model of the magnetic structure with a triangular configuration of equal magnetic moments in magnitude is proposed. The magnetic moments of manganese atoms, constituting the basis of a unit magnetic cell, lie in the (111) plane and form an equilateral triangle. According to neutron diffraction data, the magnetic moments of manganese atoms were determined at different temperatures.
Highlights
The Mn3Sb metastable compound is formed at high pressure and temperature and it decomposes upon heating above 420 K into Mn2Sb and Mn
In the present work, according to the results of neutron diffraction investigations and taking into account magnetometry data, it is shown that Mn3Sb is an antiferromagnet, and a model of the magnetic structure with a triangular configuration of equal magnetic moments in magnitude is proposed
According to neutron diffraction data, the magnetic moments of manganese atoms were determined at different temperatures
Summary
The Mn3Sb metastable compound is formed at high pressure and temperature and it decomposes upon heating above 420 K into Mn2Sb and Mn. 1. Кристаллическая структура соединения Mn3Sb Fig. 1. Ранее в работе [3] на основании нейтронографических данных, принимая во внимание отсут ствие на нейтронограммах рефлексов примесных фаз (за исключением фазы MnO, количество которой составляет около 3 %) и учитывая схожесть ближайшего окружения атомов марган ца в соединениях Mn2Sb и Mn3Sb, была предложена модель магнитной структуры соединения Mn3Sb с ферримагнитным (антипараллельным) упорядочением различных по величине атомных магнитных моментов атомов марганца. Целью настоящей статьи является определение магнитного состояния соединения Mn3Sb и установление его магнитной структуры по результатам магнитометрического и нейтроногра фического исследований.
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