Tuning Magnetic Entropy Change and Relative Cooling Power in La0.7Ca0.23Sr0.07MnO3 Electrospun Nanofibers

Gándara, Luis Andrés Burrola; Zubiate, Lizeth Vázquez; Flores, Diana María Carrillo; Galindo, José Trinidad Elizalde; Ornelas, C.; Ramos, Manuel

doi:10.3390/nano10030435

Cited by 8 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…decrease in strength of M B . It resulted in a reduction in the net magnetization of the spinel ferrite nanofiber at 300 K. Similar results have been reported by other research groups [4,28]. Moreover, the reduction in the saturation magnetization (Ms) and coercivity (Hc) following the addition of aluminium (Al) content can be ascribed to the characteristics of the surface of the synthesized Al-substituted CFO nanofiber.…”

Section: Resultssupporting

confidence: 87%

See 1 more Smart Citation

Tuning of magnetic properties of Al-doped cobalt ferrite nanofiber prepared by electrospinning technique

et al. 2023

View full text Add to dashboard Cite

The Al-doped cobalt ferrite (CoFe2-xAlxO4) nanofiber has been prepared by employing the electrospinning technique. All the nanofibers are characterized by the XRD technique. The Rietveld refinement of XRD patterns reveals the spinel cubic structure with the Fd3 ̅m space group. The TEM micrographs confirm the formation of nanofiber with a nearly uniform diameter of ⁓137±10 nm. The magnetic properties of all the nanofibers have been investigated by measuring the M-H hysteresis loops with the help of a Vibrating sample magnetometer (VSM). The M-H loops analysis demonstrates a reduction in the saturation magnetization, and coercivity from 106.88 emu/g to 40.01 emu/g and 0.897 kOe to 0.324 kOe, respectively, with the increase in Al concentration in the nanofibers. The "Law of Approach to Saturation” technique has been employed to understand the magnetocrystalline anisotropy constant in the samples. The magnetocrystalline anisotropy constant (K1) decreases with the increase in Al3+ substitution in place of Fe3+ in the spinel cobalt ferrite nanofibers. A squeezing effect on the M-H loop near M = 0 is observed and it has been analyzed by a hysteresis loop width (∆H) vs magnetization (M) plot. The squeezing effect has been observed due to the exchange interaction phenomenon between the magnetic and non-magnetic atoms in the Al-doped cobalt ferrite nanofiber. The magnetic properties study demonstrates that Al-doped cobalt ferrite nanofiber exhibits soft magnetic nature.

show abstract

Section: Resultssupporting

confidence: 87%

“…These findings are consistent with similar results reported by other research groups. [28,29]. Elemental analysis of the samples has been investigated using EDAX analysis.…”

Section: Resultsmentioning

confidence: 99%

Tuning of magnetic properties of Al-doped cobalt ferrite nanofiber prepared by electrospinning technique

et al. 2023

View full text Add to dashboard Cite

show abstract

“…These methods include different combinations of precipitation and impregnation of copper-and zinc-oxides over ZSM-5, which enable the establishment of different levels of distribution of the active materials for catalytic CO 2 hydrogenation to methanol and its dehydration to DME. It has been demonstrated that the electrospinning (ES) technique is an efficient technique to produce fibers to be used in a wide range of applications such as the catalysis [22], electro-and photocatalysis [23,24], membranes [25], biomedicine [26], and magnetic refrigeration [27]. In this context, ES catalysts in the form of fibers were tested in this research along with the catalysts synthesized using the above-mentioned methods.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of Carbon Dioxide to Dimethyl Ether on CuO–ZnO/ZSM-5 Catalysts: Comparison of Powder and Electrospun Structures

Nejadsalim,

Godini,

Ramesh Kumar

et al. 2023

Materials

View full text Add to dashboard Cite

The promising direct dimethyl ether (DME) production through CO2 hydrogenation was systematically analyzed in this research by synthesizing, characterizing, and testing several catalytic structures. In doing so, various combinations of precipitation and impregnation of copper- and zinc-oxides (CuO–ZnO) over a ZSM-5 zeolite structure were applied to synthesize the hybrid catalysts capable of hydrogenating carbon dioxide to methanol and dehydrating it to DME. The resulting catalytic structures, including the co-precipitated, sequentially precipitated, and sequentially impregnated CuO–ZnO/ZSM-5 catalysts, were prepared in the form of particle and electrospun fibers with distinguished chemical and structural features. They were then characterized using XRD, BET, XPS, ICP, TGA, SEM, and FIB-SEM/EDS analyses. Their catalytic performances were also tested and analyzed in light of their observed characteristics. It was observed that it is crucial to establish relatively small-size and well-distributed zeolite crystals across a hybrid catalytic structure to secure a distinguished DME selectivity and yield. This approach, along with other observed behaviors and the involved phenomena like catalyst particles and fibers, clusters of catalyst particles, or the whole catalytic bed, were analyzed and explained. In particular, the desired characteristics of a CuO–ZnO/ZSM-5 hybrid catalyst, synthesized in a single-pot processing of the precursors of all involved catalytically active elements, were found to be promising in guiding the future efforts in tailoring an efficient catalyst for this system.

show abstract

Synthesis, magnetic and magnetocaloric properties of transition element doped La0.67Ba0.33MnO3

Priyanka¹,

Teja²,

Sagar³

et al. 2022

J Therm Anal Calorim

View full text Add to dashboard Cite

Tuning Magnetic Entropy Change and Relative Cooling Power in La0.7Ca0.23Sr0.07MnO3 Electrospun Nanofibers

Cited by 8 publications

References 21 publications

Tuning of magnetic properties of Al-doped cobalt ferrite nanofiber prepared by electrospinning technique

Tuning of magnetic properties of Al-doped cobalt ferrite nanofiber prepared by electrospinning technique

Hydrogenation of Carbon Dioxide to Dimethyl Ether on CuO–ZnO/ZSM-5 Catalysts: Comparison of Powder and Electrospun Structures

Synthesis, magnetic and magnetocaloric properties of transition element doped La0.67Ba0.33MnO3

Contact Info

Product

Resources

About