scholarly journals Anion Doping of Ferromagnetic Thin Films of La0.74Sr0.26MnO3−δ via Topochemical Fluorination

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1204 ◽  
Author(s):  
Parvathy Anitha Sukkurji ◽  
Alan Molinari ◽  
Christian Reitz ◽  
Ralf Witte ◽  
Christian Kübel ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Exchange Interactions ◽  
Film Structure ◽  
Magnetic Characteristics ◽  
Perovskite Manganites ◽  
Strong Impact ◽  
Chemical Doping ◽  
Fluoride Ions ◽  
Ferromagnetic Thin Films

Chemical doping via insertion of ions into the lattice of a host material is a key strategy to flexibly manipulate functionalities of materials. In this work, we present a novel case study on the topotactic insertion of fluoride ions into oxygen-deficient ferromagnetic thin films of La0.74Sr0.26MnO3−δ (LSMO) epitaxially grown onto single-crystal SrTiO3 (STO) substrates. The effect of fluorination on the film structure, composition, and magnetic properties is compared with the case of oxygen-deficient and fully-oxidized LSMO films. Although incorporation of F− anions does not significantly alter the volume of the LSMO unit cell, a strong impact on the magnetic characteristics, including a remarkable suppression of Curie temperature and saturation magnetization accompanied by an increase in magnetic coercivity, was found. The change in magnetic properties can be ascribed to the disruption of the ferromagnetic exchange interactions along Mn-anion-Mn chains driven by F− doping into the LSMO lattice. Our results indicate that F− doping is a powerful means to effectively modify the magnetic functional properties of perovskite manganites.

scholarly journals Enhanced Magnetic Properties of BiFeO3 Thin Films by Doping: Analysis of Structure and Morphology

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 711 ◽  
Author(s):  
Yilin Zhang ◽  
Yuhan Wang ◽  
Ji Qi ◽  
Yu Tian ◽  
Mingjie Sun ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Sol Gel ◽  
Exchange Interactions ◽  
Ferromagnetic Behavior ◽  
Ferromagnetic Properties ◽  
Structure And Morphology ◽  
Related Diversification ◽  
Lattice Distortions ◽  
Mn Doped

The improvement of ferromagnetic properties is critical for the practical application of multiferroic materials, to be exact, BiFeO3 (BFO). Herein, we have investigated the evolution in the structure and morphology of Ho or/and Mn-doped thin films and the related diversification in ferromagnetic behavior. BFO, Bi0.95Ho0.05FeO3 (BHFO), BiFe0.95Mn0.05O3 (BFMO) and Bi0.95Ho0.05Fe0.95Mn0.05O3 (BHFMO) thin films are synthesized via the conventional sol-gel method. Density, size and phase structure are crucial to optimize the ferromagnetic properties. Specifically, under the applied magnetic field of 10 kOe, BHFO and BFMO thin films can produce obvious magnetic properties during magnetization and, additionally, doping with Ho and Mn (BHFMO) can achieve better magnetic properties. This enhancement is attributed to the lattice distortions caused by the ionic sizes difference between the doping agent and the host, the generation of the new exchange interactions and the inhibition of the antiferromagnetic spiral modulated spin structure. This study provides key insights of understanding the tunable ferromagnetic properties of co-doped BFO.

scholarly journals Structural and magnetic properties of MnCoGe ferromagnetic thin films produced by reactive diffusion

2019 ◽  
Vol 488 ◽  
pp. 303-315
Author(s):  
E. Assaf ◽  
A. Portavoce ◽  
L. Patout ◽  
M. Bertoglio ◽  
R. Clérac ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Reactive Diffusion ◽  
Ferromagnetic Thin Films ◽  
Structural And Magnetic Properties

Magnetic Properties of Ferromagnetic Thin Films Prepared by Ion Plating

1977 ◽  
Vol 16 (2) ◽  
pp. 259-265 ◽  
Author(s):  
Masatoshi Takao ◽  
Yoshifumi Ohta ◽  
Akira Tasaki
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Ion Plating ◽  
Ferromagnetic Thin Films

Magnetic properties of multilayer ferromagnetic thin films of Fe/La

1990 ◽  
Vol 83 (1-3) ◽  
pp. 69-71 ◽  
Author(s):  
C. Ferrater ◽  
B. Martinez ◽  
F. Badia ◽  
R. Ribas ◽  
A. Lousa ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Ferromagnetic Thin Films

scholarly journals Магнитные свойства гидридов соединений RNi-=SUB=-1-x-=/SUB=-Si-=SUB=-x-=/SUB=- (R --- Dy, Gd, x=0.05, 0.02)

2019 ◽  
Vol 61 (1) ◽  
pp. 81 ◽  
Author(s):  
С.А. Лушников ◽  
И.С. Терешина ◽  
В.Н. Вербецкий
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Curie Temperature ◽  
Crystal Lattice ◽  
Cell Volume ◽  
Unit Cell Volume ◽  
Exchange Interactions ◽  
Rare Earth Ions ◽  
Partial Substitution ◽  
Magnetic Characteristics

AbstractThe magnetic properties of intermetallic compounds GdNi_0.98Si_0.02 and DyNi_0.95Si_0.05 and hydrides based on them have been studied. It is found that a partial substitution of Si atoms for Ni atoms does not cause significant changes in the magnetic characteristics such as the Curie temperature. At the same time, incorporation of hydrogen into the crystal lattice of the GdNi_0.98Si_0.02 and DyNi_0.95Si_0.05 compounds leads to significant decrease in the Curie temperature, attenuation of exchange interactions due to significant increase in the unit cell volume (more than 20%), and an increase in the distances between magnetoactive ions. The magnetism of the initial and also hydrogenated compositions are mainly determined by the contribution from the subsystem of the rare-earth ions.

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