Magnetic phase diagram of the solid solution LaMn2(Ge1−x Si x )2 (0 ≤ x ≤ 1) unraveled by powder neutron diffraction

Autor: Stefanie Siebeneichler, Alexander Ovchinnikov, Brianna Bosch-Santos, Gabriel A. Cabrera-Pasca, Roxana Flacau, Qingzhen Huang, Artur W. Carbonari, Dominic Ryan, Anja-Verena Mudring
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Scientific Reports, Vol 12, Iss 1, Pp 1-16 (2022)
Druh dokumentu: article
ISSN: 2045-2322
DOI: 10.1038/s41598-022-12549-y
Popis: Abstract The structural and magnetic properties of the ThCr2Si2-type solid solution LaMn2(Ge1−x Si x )2 (x = 0.0 to 1.0) have been investigated employing a combination of X-ray diffraction, magnetization and neutron diffraction measurements, which allowed establishing a magnetic composition-temperature phase diagram. Substitution of Ge by Si leads to a compression of the unit cell, which affects the magnetic exchange interactions. In particular, the magnetic structure of LaMn2(Ge1−x Si x )2 is strongly affected by the unit cell parameter c, which is related to the distance between adjacent Mn layers. Commensurate antiferromagnetic layers and a canted ferromagnetic structure dominate the Si-rich part of the solid solution, whilst an incommensurate antiferromagnetic flat spiral and a conical magnetic structure are observed in the Si-poor part.
Databáze: Directory of Open Access Journals
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