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2026 Vol.36, Issue 4

Review

Gas Sensors Based on Magnetic Ferrite Materials: Influence of Rare-Earth Dopants Lanthanum and Dysprosium on Sensing Properties
Deepapriya Subramaniyan1*
,
John David Rodney2*
,
Simon Edward Moulton3
,
Byung Chul Kim2†
1PG and Research Department of Physics, Auxilium College (Autonomous), Vellore 632006, India
2Department of Advanced Components and Materials Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
3Department of Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
†Corresponding author E-Mail : bckim@scnu.ac.kr (B. C. Kim, Sunchon Nat’l Univ.)
*These two authors are equally contributed as first authors.
27 April 2026. pp. 131-140
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Abstract

Magnetic ferrites are spinel-structured transition-metal oxide-based nanoparticles that exhibit distinctive magnetic, electrical, and surface characteristics, rendering them highly promising materials for gas-sensing technologies. Rare-earth doping, particularly with lanthanum (La) and dysprosium (Dy), induces substantial alterations in crystal symmetry, electronic structure, defect chemistry, and magnetic behavior within the ferrite lattice. Such intrinsic modifications profoundly govern gas adsorption kinetics, surface reactivity, and charge-carrier transport, all of which are pivotal to achieving superior sensing performance. This review provides a rigorous and comprehensive evaluation of recent advances in La- and Dy-doped ferrite-based catalysts for gas sensors, with specific emphasis on synthesis strategies, structure-property correlations, sensing mechanisms, and key performance indicators. The analysis demonstrates that rare-earth incorporation improves sensitivity, selectivity, response stability, and thermal robustness through the generation of oxygen vacancies, modulation of grain-boundary characteristics, and enhancement of surface-active sites. The review finally concludes by outlining critical future research priorities and translational considerations for scalable, commercially viable sensor deployment.

Keywords
gas sensors
ferrites
rare-earth doping
oxygen vacancies
magnetic properties
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 36
  • No :4
  • Pages :131-140
  • Received Date : 2026-01-26
  • Revised Date : 2026-03-23
  • Accepted Date : 2026-04-08
  • DOI :https://doi.org/10.3740/MRSK.2026.36.4.131
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