Hall effect in strained La 0.85Ba 0.15MnO 3 thin films

Teruo Kanki, Takeshi Yanagida, Bertrand Vilquin, Hidekazu Tanaka, Tomoji Kawai

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Unique properties concerning the Curie temperature (T C) of lightly doped La 1-xBa xMnO 3 thin films (0.05≤x≤0.2) possessing tensile strain from the substrate have been discovered. It was found that T C increased significantly up to room temperature with decreasing film thickness. The purpose of this study was to employ Hall measurements to delineate the fundamental electric parameters associated with the observed enhancement in T C. The T C of a fabricated La 0.85Ba 0.15MnO 3 epitaxial thin film increased from 258 K for a 729-nm-thick above room temperature (305 K) for 24-nm-thick film. The carrier density of films with various thickness was found to be almost constant (∼6 × 10 20 cm -3) at 10 K, whereas the Hall mobility dramatically increased, from 5 cm 2/Vs for the 729-nm-thick film to 50 cm 2/Vs for the 24-nm-thick film. These results indicated that the enhancement in T C was induced by an increase in carrier transfer resulting from lattice deformation of Mn-O-Mn networks rather than an increase in carrier density associated with ionic vacancy.

Original languageEnglish
Article number012403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 1 2005
Externally publishedYes

Fingerprint

Hall effect
Thick films
thick films
Thin films
Carrier concentration
thin films
Hall mobility
augmentation
Tensile strain
Epitaxial films
room temperature
Curie temperature
Vacancies
Film thickness
film thickness
Temperature
Substrates

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Hall effect in strained La 0.85Ba 0.15MnO 3 thin films. / Kanki, Teruo; Yanagida, Takeshi; Vilquin, Bertrand; Tanaka, Hidekazu; Kawai, Tomoji.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 1, 012403, 01.01.2005.

Research output: Contribution to journalArticle

Kanki, Teruo ; Yanagida, Takeshi ; Vilquin, Bertrand ; Tanaka, Hidekazu ; Kawai, Tomoji. / Hall effect in strained La 0.85Ba 0.15MnO 3 thin films. In: Physical Review B - Condensed Matter and Materials Physics. 2005 ; Vol. 71, No. 1.
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