Comparative Study of Magnetic Properties of (Mn1−xAxIV)Bi2Te4 AIV = Ge, Pb, Sn | Sciact - CRIS-system of Boreskov Institute of Catalysis

Comparative Study of Magnetic Properties of (Mn1−xAxIV)Bi2Te4 AIV = Ge, Pb, Sn Full article

Journal

Magnetochemistry
ISSN: 2312-7481

Output data

Year: 2023, Volume: 9, Number: 9, Article number : 210, Pages count : 11 DOI: 10.3390/magnetochemistry9090210

Tags

topological insulators; modification of magnetic properties; antiferromagnetics; doping; SQUID magnetometry; ARPES

Authors

Estyunin Dmitry A. ¹ , Rybkina Anna A. ¹ , Kokh Konstantin A. ^1,2 , Tereshchenko Oleg E. ^1,3,4 , Likholetova Marina V. ¹ , Klimovskikh Ilya I. ⁵ , Shikin Alexander M. ¹

Affiliations

1	Department of Physics, Saint Petersburg State University, 198504 St. Petersburg, Russia
2	Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
3	Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
4	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630559 Kol’tsovo, Russia
5	Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain

We investigated the magnetic properties of the antiferromagnetic (AFM) topological insulator MnBi2Te4 with a partial substitution of Mn atoms by non-magnetic elements (AIV = Ge, Pb, Sn). Samples with various element concentrations (10–80%) were studied using SQUID magnetometry. The results demonstrate that, for all substitutes the type of magnetic ordering remains AFM, while the Néel temperature (TN) and spin-flop transition field (HSF) decrease with an increasing AIV = Ge, Pb, Sn concentration. The rate of decrease varies among the elements, being highest for Pb, followed by Sn and Ge. This behavior is attributed to the combined effects of the magnetic dilution and lattice parameter increase on magnetic properties, most prominent in (Mn1−xPbx)Bi2Te4 . Besides this, the linear approximation of the experimental data of TN and HSF suggests higher magnetic parameters for pure MnBi2Te4 than observed experimentally, indicating the possibility of their non-monotonic variation at low concentrations and the potential for enhancing magnetic properties through doping MnBi2Te4 with small amounts of nonmagnetic impurities. Notably, the (Mn1−xPbx)Bi2Te4 sample with 10% Pb substitution indeed exhibits increased magnetic parameters, which is also validated by local-probe analyses using ARPES. Our findings shed light on tailoring the magnetic behavior of MnBi2Te4-based materials, offering insights into the potential applications in device technologies

Estyunin D.A. , Rybkina A.A. , Kokh K.A. , Tereshchenko O.E. , Likholetova M.V. , Klimovskikh I.I. , Shikin A.M.
Comparative Study of Magnetic Properties of (Mn1−xAxIV)Bi2Te4 AIV = Ge, Pb, Sn
Magnetochemistry. 2023. V.9. N9. 210 :1-11. DOI: 10.3390/magnetochemistry9090210 WOS Scopus ANCAN OpenAlex publication_identifier_short.sciact_skif_identifier_type

Submitted:	Jul 19, 2023
Accepted:	Sep 11, 2023
Published print:	Sep 13, 2023
Published online:	Sep 13, 2023

Web of science:	WOS:001073602300001
Scopus:	2-s2.0-85172163192
Chemical Abstracts:	2023:2069479
Chemical Abstracts (print):	184:264265
OpenAlex:	W4386711319
publication_identifier.sciact_skif_identifier_type:	2267

DB	Citing
OpenAlex	4
Web of science	2
Scopus	3