We investigated the magnetic properties of polycrystalline samples of the intrinsic magnetic topological insulators MnPn(2)Te(4), with pnictogen Pn = Sb, Bi, by bulk magnetization and mu SR. DC susceptibility detects the onset of magnetic ordering at T-N = 27 K and 24 K and a field dependence of the macroscopic magnetization compatible with ferri- (or ferro-) and atiferro- magnetic ordering, respectively. Weak transverse field (wTF) Muon Spin Rotation (mu SR) confirms the homogeneous bulk nature of magnetic ordering at the same two distinct transition temperatures. Zero Field (ZF) mu SR shows that the Sb based material displays a broader distribution of internal field at the muon, in accordance with a larger deviation from the stoichiomectric composition and a higher degree of positional disorder (Mn at the Pn(6c) site), which however does not affect significantly the sharpness of the thermodynamic transition, as detected by the muon magnetic volume fraction and the observability of a critical divergence in the longitudinal and transverse muon relaxation rates.
Impact of Mn-Pn intermixing on magnetic properties of an intrinsic magnetic topological insulator: The μsR perspective / Sahoo, M.; Salman, Z.; Allodi, G.; Isaeva, A.; Folkers, L.; Wolter, A. U. B.; Büchner, B.; De Renzi, R.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 2462:1(2023). [10.1088/1742-6596/2462/1/012040]
Impact of Mn-Pn intermixing on magnetic properties of an intrinsic magnetic topological insulator: The μsR perspective
Sahoo M.
;Allodi G.;De Renzi R.
2023-01-01
Abstract
We investigated the magnetic properties of polycrystalline samples of the intrinsic magnetic topological insulators MnPn(2)Te(4), with pnictogen Pn = Sb, Bi, by bulk magnetization and mu SR. DC susceptibility detects the onset of magnetic ordering at T-N = 27 K and 24 K and a field dependence of the macroscopic magnetization compatible with ferri- (or ferro-) and atiferro- magnetic ordering, respectively. Weak transverse field (wTF) Muon Spin Rotation (mu SR) confirms the homogeneous bulk nature of magnetic ordering at the same two distinct transition temperatures. Zero Field (ZF) mu SR shows that the Sb based material displays a broader distribution of internal field at the muon, in accordance with a larger deviation from the stoichiomectric composition and a higher degree of positional disorder (Mn at the Pn(6c) site), which however does not affect significantly the sharpness of the thermodynamic transition, as detected by the muon magnetic volume fraction and the observability of a critical divergence in the longitudinal and transverse muon relaxation rates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
