Figure 1
From: High Curie temperature ferromagnetic structures of (Sb2Te3)1−x(MnSb2Te4)x with x = 0.7–0.8
Magnetic properties of the (Sb2Te3)1−x(MnSb2Te4)x samples. (a) Distribution of the SL fraction (x) of all samples as a function of the Mn BEP ratio adapted from ref. 20. The three groups of samples with different Curie temperature behavior are indicated by shading of their areas blue, white and red for samples with x < 0.7 (group1), 0.7 < x < 0.8 (group 2) and x > 0.9 (group 3), respectively. (b) Hysteresis loop of the Hall resistance (Rxy) as a function of the magnetic field, B, of a selection of samples with x values ranging from 0.1 to 0.9 measured at T = 10 K. (c) Hall resistance (Rxy) measurements of a sample with x = 0.1 (10% SLs) as well as a Mn doped all-QL Sb2Te3 sample (x = 0). The latter was grown with less than 0.01 Mn BEP ratio. (d–f) Temperature dependent Rxy plots under low magnetic field of 0.02 T for representative samples from the three groups identified in (a): (d) group 1, (e) group 2, and (f) group 3.
