Back to Search
Start Over
Magnetotransport and magnetic properties of Cr-modified Mn2Sb epitaxial thin films.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 2/21/2023, Vol. 25 Issue 7, p5785-5794, 10p
- Publication Year :
- 2023
-
Abstract
- High-quality Mn<subscript>2−x</subscript>Cr<subscript>x</subscript>Sb (x = 0.01, 0.04, and 0.1) epitaxial thin films were grown on SrTiO<subscript>3</subscript> (STO) (001) single-crystal substrates using molecular beam epitaxy. Magnetotransport and magnetic measurements reveal that the x = 0.01 sample undergoes a quasi-ferrimagnetic (I) [Q-FIM(I)]-to-ferrimagnetic (II) [FIM(II)] spin reorientation (SR) transition and a giant magnetoresistance (MR) associated first-order ferrimagnetic(II)-to-antiferromagnetic (AFM) phase transition upon cooling, resulting in the AFM ground state with a weak in-plane net moment. Upon increasing the doping level from x = 0.01 to 0.1, both the SR transition and the first-order magnetic transition are suppressed. For x = 0.1, the former transition is suppressed, leaving only the Q-FIM(I)-to-AFM transition within the whole temperature region. T<subscript>AFM−FIM</subscript> shows almost similar changes upon the application of either in-plane or out-of-plane magnetic fields. T<subscript>AFM−FIM</subscript> values of the x = 0.01 and 0.04 samples are much higher than those of the Mn<subscript>2–x</subscript>Cr<subscript>x</subscript>Sb bulk with similar doping levels, which can be understood by the clamping effect from STO substrates. For each thin-film sample, the MR effect is observed near T<subscript>AFM−FIM</subscript> and disappears in the high temperature Q-FIM(I) phase and low temperature AFM phase, indicating that MR is related to the spin-dependent electron scattering during the first-order magnetic phase transition. Based on the magnetotransport and magnetic data, a magnetic phase diagram is established for the Mn<subscript>2–x</subscript>Cr<subscript>x</subscript>Sb films in the low doping level region. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 25
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 161933128
- Full Text :
- https://doi.org/10.1039/d2cp05442f