Magnetic structure of La^sub 1-x^Tb^sub x^Mn^sub 2^Si^sub 2^ compounds

The magnetic structure of La1-xTbxMn2Si2 compounds with 0 ≤ x ≤ 1 has been studied by powder neutron diffraction and magnetization measurements on single-crystal samples. We demonstrate that at 4.2 K, with increasing the Tb concentration, a canted ferromagnetic structure of LaMn2Si2 changes at x >...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2018-01, Vol.731, p.397
Main Authors: Gerasimov, EG, Mushnikov, NV, Terentev, PB, Pirogov, AN
Format: Article
Language:English
Subjects:
Anisotropy
Antiferromagnetism
Diffraction
Ferrimagnetism
Ferromagnetism
Filing
Interlayers
Magnetic anisotropy
Magnetic structure
Neutron diffraction
Neutrons
Silicon compounds
Single crystals
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The magnetic structure of La1-xTbxMn2Si2 compounds with 0 ≤ x ≤ 1 has been studied by powder neutron diffraction and magnetization measurements on single-crystal samples. We demonstrate that at 4.2 K, with increasing the Tb concentration, a canted ferromagnetic structure of LaMn2Si2 changes at x > 0.2 to a canted antiferromagnetic structure. The antiferromagnetic in-plane component of Mn moment decreases with increasing concentration x and vanishes at x > 0.5. TbMn2Si2 is characterized by a collinear in-plane Mn ordering and ferrimagnetic structure, in which the Mn sublattice possesses the ferromagnetic interlayer alignment along the easy c-axis. Neutron diffraction study does not reveal a long-range magnetic order of Tb moments for the compounds with x ≤ 0.4. Our results show that for concentrations 0.2 < x ≤ 0.4, a competition of the interlayer Tb-Mn, Mn-Mn exchange interactions and strong uniaxial magnetic anisotropy leads to formation of a frustrated magnetic state of Tb ions, which prevents magnetic ordering in the Tb sublattice.
ISSN:0925-8388
1873-4669