https://doi.org/10.1140/epjb/s10051-021-00100-3
Regular Article - Solid State and Materials
3D-Heisenberg ferromagnetic characteristics in a LaBaMnO film on SrTiO
1
Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Anhui Province, Chinese Academy of Sciences, 230031, Hefei, China
2
Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, 230026, Hefei, China
3
Institutes of Physical Science and Information Technology, Anhui University, 230601, Hefei, China
4
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
Received:
10
November
2020
Accepted:
2
April
2021
Published online:
29
April
2021
We conducted a study of critical exponents to investigate the nature of paramagnetic to ferromagnetic phase transition in a LaBaMnO (LBMO) film deposited on SrTiO. To this end, we performed dc magnetization M (H, T) measurements around the Curie temperature ( 276.5 K) within a temperature range that includes the critical region /. We found that the transition is a second-order transition. Three main critical exponents, namely (0.387), (1.309) and (4.634), and the critical temperature 276.6 K are derived from the modified Arrott plots. These exponents obey the Widom relation 1/ and are able to collapse a bunch of isothermal magnetization data into two branches below and above based on the single scaling equation M(). The critical behavior in LBMO film is close to a 3D Heisenberg model, although certain long-range interactions still exist. Compared to a polycrystalline bulk sample, the long-range interactions are greatly suppressed, which may be attributed to the reduced dimensionality.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021