ArticleSensors (Basel, Switzerland)2022
Enhancement of Room-Temperature Low-Field Magnetoresistance in Nanostructured Lanthanum Manganite Films for Magnetic Sensor Applications.
Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Stabilization of Transport Properties in Thin Nonstoichiometric LaSensors (Basel, Switzerland) · 2026Article
- Field- and Angle-Dependent AC Susceptibility in Multigrain LaMaterials (Basel, Switzerland) · 2026Article
- Hybrid manganite-graphene sensor for magnetic field magnitude and direction measurement.Scientific reports · 2025Article
- Magnetic Field Meter Based on CMR-B-Scalar Sensor for Measurement of Microsecond Duration Magnetic Field Pulses.Sensors (Basel, Switzerland) · 2025Article
- Enhanced magnetoresistance properties of K-site deficient LaRSC advances · 2024Article
- Magnetoresistance and Magnetic Relaxation of La-Sr-Mn-O Films Grown on Si/SiOSensors (Basel, Switzerland) · 2023Article
- Engineering of Advanced Materials for High Magnetic Field Sensing: A Review.Sensors (Basel, Switzerland) · 2023Review
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Abstract
The results of colossal magnetoresistance (CMR) properties of La1-xSrxMnyO3 (LSMO) films grown by the pulsed injection MOCVD technique onto an Al2O3 substrate are presented. The grown films with different Sr (0.05 ≤ x ≤ 0.3) and Mn excess (y > 1) concentrations were nanostructured with vertically aligned column-shaped crystallites spread perpendicular to the film plane. It was found that microstructure, resistivity, and magnetoresistive properties of the films strongly depend on the strontium and manganese concentration. All films (including low Sr content) exhibit a metal−insulator transition typical for manganites at a certain temperature, Tm. The Tm vs. Sr content dependence for films with a constant Mn amount has maxima that shift to lower Sr values with the increase in Mn excess in the films. Moreover, the higher the Mn excess concentration in the films, the higher the Tm value obtained. The highest Tm values (270 K) were observed for nanostructured LSMO films with x = 0.17−0.18 and y = 1.15, while the highest low-field magnetoresistance (0.8% at 50 mT) at room temperature (290 K) was achieved for x = 0.3 and y = 1.15. The obtained low-field MR values were relatively high in comparison to those published in the literature results for lanthanum manganite films prepared without additional insulating oxide phases. It can be caused by high Curie temperature (383 K), high saturation magnetization at room temperature (870 emu/cm3), and relatively thin grain boundaries. The obtained results allow to fabricate CMR sensors for low magnetic field measurement at room temperature.
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