Strange critical behaviors of ferromagnetic to paramagnetic transition in La0.5Ca0.5MnO3 nanowires bundles

Fang, F.; Hong, Bo; Ling, Langsheng; Xu, Jingcai; Jin, Hongxiao; Jin, Dingfeng; Peng, Xiaoling; Li, Jing; Yang, Yanting; Wang, Xinqing

doi:10.1039/c6ra00650g

Cited by 6 publications

(2 citation statements)

References 53 publications

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“…Similarly, γ describes the divergence of the initial magnetic susceptibility above T C and δ describes the curvature of magnetic hysteresis (MH) curve at T C . The MH plot shows less curvature as the δ value decreases [17]. The critical exponents sometimes come out with unexpected values due to a decrease in particle size and surface effects [17].…”

Section: Introductionmentioning

confidence: 95%

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Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Sahoo

Barik

Kuila

et al. 2022

J. Phys. D: Appl. Phys.

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Bismuth (Bi) substituted strontium hexaferrite, Sr1-xBixFe12O19; for x = 0, 0.01 and 0.02 are studied via powder neutron diffraction (ND), magnetization (M) studies, Mössbauer spectroscopy and electrical transport. ND results show an indication of increasing Fe2+ at 12k crystallographic sites (and is supported by Mössbauer results), with increasing Bi in the sample. It also suggests increase in strain due to Bi substitution for the polyhedral associated with 2a and 2b spin-up and 4f1 spin-down sites. Magnetization measurements in a wide temperature range (3 – 823 K), shows irreversibility in zero field cooled (ZFC) and field cooled (FC) data right below the Curie temperature, along with the Hopkinson peak in the ZFC data. Temperature dependence of saturation magnetization follows the Bloch relation but that of coercive field shows an unconventional behavior. The coercive field data is fitted using an equation devised by taking into consideration of all the three anisotropies. The critical exponents at the ferromagnetic-paramagnetic phase transition boundary are calculated using modified Arrott plots, are slightly overvalued as per mean-field theory. Temperature dependence of resistivity displays nearest-neighbor hopping conduction in all the three samples. The conductivity increases with increasing Bi in the sample, due to the increasing Fe2+ content, which facilitates the electron hopping between Fe-sites. The magnetoresistance measured at various sub-room temperatures for all the compounds shows the interplay of anisotropy magnetoresistance (AMR) and giant magnetoresistance (GMR). Low temperature data are dominated by GMR and gradual participation of AMR increases as room temperature is approached.

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Section: Introductionmentioning

confidence: 95%

“…The MH plot shows less curvature as the δ value decreases [17]. The critical exponents sometimes come out with unexpected values due to a decrease in particle size and surface effects [17].…”

Section: Introductionmentioning

confidence: 95%

Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Sahoo

Barik

Kuila

et al. 2022

J. Phys. D: Appl. Phys.

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Structural characterization, magnetic, magnetocaloric properties and critical behavior in lacunar La0.5Eu0.2Ba0.2□0.1MnO3 nanoparticles

Mleiki

M’nassri

Cheikhrouhou‐Koubaa

et al. 2017

Journal of Alloys and Compounds

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Continuously varying of critical exponents with the bismuth doped in the La0.8Na0.2Mn1-xBixO3 (0 ≤ x ≤ 0.06) manganites

Laouyenne

Baazaoui

Mahjoub

et al. 2018

Journal of Magnetism and Magnetic Materials

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Strange critical behaviors of ferromagnetic to paramagnetic transition in La_0.5Ca_0.5MnO₃ nanowires bundles

Abstract: La0.5Ca0.5MnO3 nanowire bundles were synthesized by a hard template method, followed by further investigation on their strange critical behaviors.

Cited by 6 publications

References 53 publications

Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Structural characterization, magnetic, magnetocaloric properties and critical behavior in lacunar La0.5Eu0.2Ba0.2□0.1MnO3 nanoparticles

Continuously varying of critical exponents with the bismuth doped in the La0.8Na0.2Mn1-xBixO3 (0 ≤ x ≤ 0.06) manganites

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Strange critical behaviors of ferromagnetic to paramagnetic transition in La0.5Ca0.5MnO3 nanowires bundles

Abstract: La0.5Ca0.5MnO3 nanowire bundles were synthesized by a hard template method, followed by further investigation on their strange critical behaviors.

Cited by 6 publications

References 53 publications

Magnetic and electrical transport studies of polycrystalline Sr1− x Bi x Fe12O19 (x = 0, 0.01, and 0.02)

Magnetic and electrical transport studies of polycrystalline Sr1− x Bi x Fe12O19 (x = 0, 0.01, and 0.02)

Structural characterization, magnetic, magnetocaloric properties and critical behavior in lacunar La0.5Eu0.2Ba0.2□0.1MnO3 nanoparticles

Continuously varying of critical exponents with the bismuth doped in the La0.8Na0.2Mn1-xBixO3 (0 ≤ x ≤ 0.06) manganites

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Strange critical behaviors of ferromagnetic to paramagnetic transition in La_0.5Ca_0.5MnO₃ nanowires bundles

Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Magnetic and electrical transport studies of polycrystalline Sr₁₋ _x Bi _x Fe₁₂O₁₉ (x = 0, 0.01, and 0.02)

Continuously varying of critical exponents with the bismuth doped in the La0.8Na0.2Mn1-xBixO3 (0 ≤ x ≤ 0.06) manganites