Magnetic properties and phase transitions in molecular based materials containing rare earth ions and organic radicals (invited)

1993 ◽  
Vol 73 (10) ◽  
pp. 5333-5337 ◽  
Author(s):  
Cristiano Benelli ◽  
Andrea Caneschi ◽  
Dante Gatteschi ◽  
Roberta Sessoli
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Phase Transitions ◽  
Rare Earth Ions ◽  
Organic Radicals

Structural, Morphological and Magnetic Characterization of Sm-substituted Ni-Zn Ferrite

2020 ◽  
Vol 10 (2) ◽  
pp. 152-156 ◽  
Author(s):  
Muhammad Hanif bin Zahari ◽  
Beh Hoe Guan ◽  
Lee Kean Chuan ◽  
Afiq Azri bin Zainudin
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Saturation Magnetization ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Rare Earth Ions ◽  
Ion Concentration ◽  
Zn Ferrite ◽  
Auto Combustion ◽  
Combustion Technique

Background: Rare earth materials are known for its salient electrical insulation properties with high values of electrical resistivity. It is expected that the substitution of rare earth ions into spinel ferrites could significantly alter its magnetic properties. In this work, the effect of the addition of Samarium ions on the structural, morphological and magnetic properties of Ni0.5Zn0.5SmxFe2-xO4 (x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) synthesized using sol-gel auto combustion technique was investigated. Methods: A series of Samarium-substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5SmxFe2-xO4 where x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by sol-gel auto-combustion technique. Structural, morphological and magnetic properties of the samples were examined through X-Ray Diffraction (XRD), Field-Emission Scanning Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM) measurements. Results: XRD patterns revealed single-phased samples with spinel cubic structure up to x= 0.04. The average crystallite size of the samples varied in the range of 41.8 – 85.6 nm. The prepared samples exhibited agglomerated particles with larger grain size observed in Sm-substituted Ni-Zn ferrite as compared to the unsubstituted sample. The prepared samples exhibited typical soft magnetic behavior as evidenced by the small coercivity field. The magnetic saturation, Ms values decreased as the Sm3+ concentration increases. Conclusion: The substituted Ni-Zn ferrites form agglomerated particles inching towards more uniform microstructure with each increase in Sm3+ substitution. The saturation magnetization of substituted samples decreases with the increase of samarium ion concentration. The decrease in saturation magnetization can be explained based on weak super exchange interaction between A and B sites. The difference in magnetic properties between the samples despite the slight difference in Sm3+ concentrations suggests that the properties of the NiZnFe2O4 can be ‘tuned’, depending on the present need, through the substitution of Fe3+ with rare earth ions.

Influence of rare-earth ions on structural and magnetic properties of CdFe2O4 ferrites

Rare Metals ◽  
2010 ◽  
Vol 29 (2) ◽  
pp. 168-173 ◽  
Author(s):  
Ashok Gadkari ◽  
Tukaram Shinde ◽  
Pramod Vasambekar
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Ions ◽  
Structural And Magnetic Properties

The influences of Zn2+ and some rare-earth ions on the magnetic properties of nickel–zinc ferrites

2004 ◽  
Vol 281 (2-3) ◽  
pp. 173-177 ◽  
Author(s):  
Ge-Liang Sun ◽  
Jian-Bao Li ◽  
Jing-Jing Sun ◽  
Xiao-Zhan Yang
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Ions ◽  
Nickel Zinc

Effect of Sm Doping on Magnetic Properties of Sr2FeMoO6

2010 ◽  
Vol 663-665 ◽  
pp. 76-79
Author(s):  
Zhen Feng Xu ◽  
Jun Liang ◽  
Juan Pei ◽  
Yan Yan Yin ◽  
Chang Li
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Single Phase ◽  
Steric Effect ◽  
Magnetic Measurements ◽  
Double Perovskite ◽  
Rare Earth Ions ◽  
X Ray ◽  
Curie Temperature Tc

New electron doped double perovskite compound (Sr2-xSmx) FeMoO6 (0≤x≤0.25) has been synthesized by solid-state reaction. Crystal structure and magnetic properties of the compounds have been investigated by X-ray powder diffraction (XRD) and magnetic measurements. XRD revealed that all the compounds were of single phase and belonged to a I 4/m lattice. The degree of cationic ordering on the B site was decreased pronouncedly by the electron doping. Different from the results of La- and Nd-doped Sr2FeMoO6, Curie temperature (TC) of (Sr2-xSmx) FeMoO6 decreased first with the doping and then increased beyond x = 0.15, indicating that steric effect was enhanced as the radius of rare-earth ions decreased.

Effect of rare-earth ions on magnetic properties and spin excitations in manganites

2004 ◽  
Vol 272-276 ◽  
pp. 96-97 ◽  
Author(s):  
A.A Mukhin ◽  
V.Yu Ivanov ◽  
V.D Travkin ◽  
A.S Prokhorov ◽  
A.M Balbashov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Ions ◽  
Spin Excitations

Magnetic properties of (Sr1.85Ln0.15)FeMoO6 with Ln = Sr, La, Ce, Pr, Nd, Sm and Eu

2011 ◽  
Vol 239-242 ◽  
pp. 3109-3112 ◽  
Author(s):  
Qin Zhang ◽  
Qing Wang ◽  
Zhen Cui Sun ◽  
Ke Yan Wang
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Ionic Radius ◽  
Single Phase ◽  
Magnetic Measurements ◽  
Rare Earth Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rare Earth Doped ◽  
The Eu

Rare-earth-doped compounds (Sr1.85Ln0.15)FeMoO6(Ln=Sr, La, Ce, Pr, Nd, Sm and Eu) have been prepared by solid-state reaction. Crystal structure and magnetic properties were investigated by means of X-ray diffraction and magnetic measurements. All the samples are single phase and belong to the I4/m space group. Due to the competing contributions of electron doping and steric effects, the unit-cell volume of the doped compounds changes slightly and does not vary systematically with the ionic radius of the rare-earth ions. The temperature dependence of the magnetization of (Sr1.85Ln0.15)FeMoO6indicates that the Curie temperature of the doped compounds has increased upon doping, except for the Eu-doped compound.

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.

Photoluminescence and magnetic properties of CdPS3 intercalated with rare earth ions

2008 ◽  
Vol 451 (1-2) ◽  
pp. 470-472 ◽  
Author(s):  
Masayuki Aoike ◽  
Toshihiro Masubuchi ◽  
Eisuke Gonmori ◽  
Yoji Kubota ◽  
Tadataka Watanabe ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Ions
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