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Low temperature magneto-structural transitions in Mn3Ni20P6
Uppsala University, Sweden.
Nuclear Physics Institute, Czech Republic.
AB Sandvik, Sweden.
Etteplan Sweden AB, Sweden.
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2016 (English)In: Journal of Solid State Chemistry, ISSN 0022-4596, E-ISSN 1095-726X, Vol. 237, p. 343-348Article in journal (Refereed) Published
Abstract [en]

X-ray and neutron powder diffraction has been used to determine the crystal and magnetic structure of Mn3Ni20P6. The crystal structure can be described as cubic with space group Fm3¯m (225) without any nuclear phase transformation within studied temperature interval from room temperature down to 4 K. The magnetic structure of Mn3Ni20P6 is complex with two independent magnetic positions for the Mn atoms and the compound passes three successive magnetic phase transitions during cooling. At 30 K the spins of the Mn atoms on the Wyckoff 4a site (Mn1) order to form a primitive cubic antiferromagnetic structure with propagation vector k=(0 0 1). Between 29 and 26 K the Mn atoms on the Wyckoff 8c site (Mn2) order independently on already ordered Mn1 magnetic structure forming a commensurate antiferromagnetic structure with propagation vector k=(0 0 12) and below 26 K, both Mn positions order to form an incommensurate helical structure with propagation vector k=(0 0 ~0.45). Magnetization vs. temperature curve of Mn3Ni20P6 shows a steep increase indicating some magnetic ordering below 230 K and a sharp field dependent anomaly in a narrow temperature range around 30 K.

Place, publisher, year, edition, pages
Academic Press Inc. , 2016. Vol. 237, p. 343-348
Keywords [en]
Antiferromagnetism, Magnetic structure, Mn-compounds, Neutron diffraction, Antiferromagnetic materials, Atoms, Crystal atomic structure, Crystallography, Magnetism, Manganese, Nickel, Temperature, Antiferromagnetic structures, Crystal and magnetic structure, Helical structures, Magnetic phase transitions, Narrow temperature ranges, Propagation vector, Structural transitions, Temperature intervals, Crystal structure
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41308DOI: 10.1016/j.jssc.2016.02.028Scopus ID: 2-s2.0-84962268845OAI: oai:DiVA.org:ri-41308DiVA, id: diva2:1377312
Note

Funding text 1: Financial support from the Swedish Research Council and the KAW Foundation is gratefully acknowledged. PB acknowledges support from CANAM Infrastructure (MSMT Project no. LM2011019 ) and NMI3-II Project (Grant no. 283883 ).

Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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