Journal ArticleDOI
Growth and giant magnetoresistance properties of La‐deficient LaxMnO3−δ (0.67≤x≤1) films
Ayush Gupta,T. R. McGuire,P. R. Duncombe,M. Rupp,Jonathan Z. Sun,William J. Gallagher,Gang Xiao +6 more
TLDR
In this paper, the authors used pulsed laser deposition to grow thin films of lanthanum-deficient LaxMnO3−δ (0.67≤x≤1) on (100) SrTiO3 substrates, which exhibit a ferromagnetic transition at temperatures ranging from 115 to 240 K with the transition temperature increasing with higher La deficiency.Abstract:
Epitaxial thin films of lanthanum‐deficient LaxMnO3−δ (0.67≤x≤1) have been grown on (100) SrTiO3 substrates by pulsed laser deposition. The as‐deposited films exhibit a ferromagnetic transition at temperatures ranging from 115 to 240 K, with the transition temperature (Tc) increasing with higher La deficiency. A sharp drop in resistivity and negative magnetoresistance is observed close to Tc, a behavior similar to that observed in divalent substituted La1−xMxMnO3−δ (M=Ba, Sr, Ca, Pb) films. Postannealing the films in O2 reduces the resistivity and raises the Tc to values close to room temperature. A magnetoresistance value of 130% (Δρ/ρH) has been obtained at 300 K at 4 T for a post‐annealed film with x=0.75.read more
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Journal ArticleDOI
Colossal-magnetoresistance materials: manganites and conventional ferromagnetic semiconductors
TL;DR: In this article, experimental data and their theoretical interpretation are presented for the colossal magnetoresistance (CMR) materials to which conventional ferromagnetic semiconductors and manganites belong.
Journal ArticleDOI
Exchange bias in LaNiO3-LaMnO3 superlattices.
TL;DR: It is demonstrated how interfacial interactions can induce a complex magnetic structure in a non-magnetic material and specifically show that exchange bias can unexpectedly emerge in heterostructures consisting of paramagnetic LaNiO3 (LNO) and ferromagnetic LaMnO 3 (LMO).
Journal ArticleDOI
Giant magnetoresistance and related properties of rare-earth manganates and other oxide systems
TL;DR: Giant magnetoresistance (GMR) was found for manganate perovskites of the formula Ln{sub 1-x}A{sub x}MnO{sub 3} (Ln = rare earth, A = dipositive ion) as mentioned in this paper.
Journal ArticleDOI
Colossal magnetoresistive manganite thin films
TL;DR: In this paper, the results from different experimental techniques and the effects of the deposition procedure of mixed-valence perovskite manganite thin films are first reviewed, the relation between the structural and the physical properties is mentioned, and the influence of strains discussed.
Journal ArticleDOI
Imaging and control of ferromagnetism in LaMnO3/SrTiO3 heterostructures
X. Renshaw Wang,Changjian Li,W. M. Lü,Tula R. Paudel,D.P. Leusink,M. Hoek,Nicola Poccia,Arturas Vailionis,Thirumalai Venkatesan,J. M. D. Coey,J. M. D. Coey,Evgeny Y. Tsymbal,Ariando,Hans Hilgenkamp +13 more
TL;DR: An atomically sharp transition to a ferromagnetic phase when polar antiferromagnetic LaMnO3 (001) films are grown on SrTiO3 substrates is reported, demonstrating that functionalities can be engineered in oxide films that are only a few atomic layers thick.