Exchange-coupling behavior in soft/hard Li0.3Co0.5Zn0.2Fe2O4/SrFe12O19 core/shell composite synthesized by the two-step ball-milling-assisted ceramic process

Chen, Wen; Xiao, Chengyue; Huang, Caihong; Wu, Xuehang; Wu, Wenwei; Wang, Qiangshuai; Li, Jintao; Zhou, Kaiwen; Huang, Yifan

doi:10.1007/s10854-018-0429-7

Cited by 13 publications

(4 citation statements)

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“…It has been verified that the composition, microstructure, grain size, and strength of magnetic interaction greatly affect the exchange coupling between hard and soft ferrite phases [7,12]. The structural and magnetic properties of these NCs could be improved by optimal calcination conditions, appropriate hard-soft ratios, and well-exchange coupling between hard and soft ferrite phases [23][24][25][26]. The achievement of well-exchange coupling in hard/soft ferrite nanocomposites is still a challenging task to be accomplished [27].…”

Section: Introductionmentioning

confidence: 97%

“…For example, ferrite-polymer composites such as Ni 0.5 Zn 0.5 Fe 2 O 4 /BaFe 12 O 19 @polyaniline composites have been synthesized and investigated [6]. Additionally, the quite popular core-shell structures of NiFe 2 O 4 /SrCo 0.2 Fe 11.8 O 19 [18] and Mn 0.6 Zn 0.4 Fe 2 O 4 @Sr 0.85 Ba 0.15 Fe 12 O 19 [19] [23], and fiber-based composites such as SrFe 12 O 19 /Ni 0.5 Zn 0.5 Fe 2 O 4 nanofibers [11] have been intensively investigated. Great attention has been paid to hard/soft magnetic nanocomposites (NCs) due to the significant improvement of their overall magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

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Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

et al. 2020

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This paper reports the correlation between the composition of the functional Sr0.5Ba0.5Sm0.02Fe11.98O19/x(Ni0.8Zn0.2Fe2O4) hard–soft nanocomposites (SrBaSmFe/x(NiZnFe) NCs), where 0.0 ≤ x ≤ 3.0, and their structural features, magnetic, and microwave properties. SrBaSmFe/x(NiZnFe) hard/soft ferrite NCs are produced using the one-pot citrate combustion method. According to the XRD analysis, all samples showed the co-existence of both SrBaSmFe and NiZnFe phases in different ratios. Magnetic properties are measured in a wide range of magnetic fields and temperatures (10 and 300 K) and correlated well with the composition of the investigated samples. The microwave properties (frequency dispersions of the magnetic permeability, and electrical permittivity) are discussed by using the co-axial method in the frequency range of 0.7–18 GHz. Non-linear dependences of the main microwave features were observed with varying of composition. The microwave behavior correlated well with the composite theory. These results could be used in practice for developing antenna materials.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

et al. 2020

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“…[59,60] As listed in Tables 2 and 3, the pristine SrBa/NiFe H/S (i.e., x = 0.00) NC has the lowest values of saturation, which are 53.5 emu g −1 at RT and 71.7 emu g −1 at 10 K. However, with adding the scandium to the NCs the M s amount enhance between 60.5 and 63 emu g −1 at 300 K and between 85 and 89. one-pot sol-gel autocombustion process or physical mixing method, [62] and in core/shell magnetic composites of soft/hard xLi 0.3 Co 0.5 Zn 0.2 Fe 2 O 4 @(1 − x)SrFe 12 O 19 (x = 0.1-0.3) prepared by ball-milling-assisted ceramic route. [63] The enhancement in the M s value is related to the exchange coupling behavior existence for all the SrBaSc/NiFe H/S (x = 0.015, 0.020, 0.025, 0.030, and 0.035) NCs, but not for x = 0.000. Moreover, the values of M s at 10 K are higher than those at 300 K due to the reduction of the spin's thermal fluctuation and subsequently an increment in the exchange coupling effect.…”

Section: Magnetic Characteristicsmentioning

confidence: 94%

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites

Almessiere

Slimani

Algarou

et al. 2021

Adv Elect Materials

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The Sr0.5Ba0.5ScxFe12–xO19(SrBaSc)/NiFe2O4(NiFe) hard–soft nanocomposites (NCs) are synthesized by in situ sol–gel route. Impact of Sc3+ doping on their structure, morphology, and magnetic properties are examined. X‐ray diﬀraction confirms the coexistence of SrBaSc and NiFe phases without any impurity. Morphology of NCs reveals a cluster of hexagonal plate decorated by spherical grains. Magnetic characteristics of the NCs are examined by using a vibration sample magnetometer at room temperature and 10 K. The x = 0.000 sample shows some kinks in their M–H loops and the occurrence of two peaks in dM/dH(H). All the NCs with Sc3+ exhibit smooth shapes of M–H curves with single peak, revealing the complete and perfect exchange coupling behavior. The diverse magnetic parameters at both temperatures are determined. The values of saturation and remanent magnetizations are decreasing with the Sc content increase. The intensive electromagnetic absorption is observed in all the samples. Reﬂection loss (RL) of more than ‐18 dB is observed above 3 GHz. Strong coupling between Sc concentration and amplitude–frequency characteristics of the RL can be used for developing of the functional media for high‐frequency devices and will open broad perspectives for practical application in radar‐absorbing technology and electromagnetic compatibility.

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“…Actually, other factors such as the grain shape and defects such as oxygen vacancies can affect the magnetization of magnetic material. In addition, BSTO may show ferromagnetic behaviour because the magnetic moments would result from the oxygen deficiencies on the nanoparticles surface [40][41][42][43], but this magnetization is very weak compared with that of magnetic NZFO material. In contrast, the sample ST-1150 has the lowest H c value (25.9 Oe), while the value of H c is the largest (44.4 Oe) for the ST-1200 ceramics.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Liu

Gao

2020

PAC

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Magnetoelectric composites have attracted much attention due to their intriguing physical properties and potential applications. They might have strong magnetoelectric coupling effect above room temperature, but it mainly depends on the sintering schedule. In this paper, 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 (NZFO-BSTO) composite ceramics were prepared by conventional solid sintering method. Effects of the sintering temperature (1050, 1100, 1150 and 1200?C) on the microstructure, dielectric and multiferroic properties were investigated in detail. XRD results confirm that the prepared ceramics show bi-phase structure, which can be indexed as NZFO and BSTO. No obvious impurity phase was observed when the sintering temperature is less than 1200?C, indicating that there is no apparent chemical reaction occuring at the magnetic and ferroelectric interface. All of the samples show relatively dense and uniform structure. The mean grain size of the composites increases from 220 to 650 nm when the sintering temperature increases from 1050?C to 1200?C. The sample ST-1100 has the best frequency stability of dielectric constant, while it presents the smallest dielectric loss. All specimens present two dielectric peaks, the first one is attributed to the diffuse phase transition of BSTO, while another one generated at higher temperature corresponds to the relaxation polarization. The sample ST-1100 shows excellent ferroelectric properties, the value of remnant polarization is about 5.1 ?C/cm2 and the coercive electric field value is ~20 kV/cm. The ceramics ST-1050 and ST-1200 show larger leakage current. All samples show paramagnetic behaviour with small remnant magnetization (~0.3 emu/g) and coercive magnetic field (~30Oe). The sample ST-1100 has maximum magnetoelectric coupling coefficient of 9.6mV/cm?Oe when the magnetic field is near 1100Oe.

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Exchange-coupling behavior in soft/hard Li0.3Co0.5Zn0.2Fe2O4/SrFe12O19 core/shell composite synthesized by the two-step ball-milling-assisted ceramic process

Cited by 13 publications

References 44 publications

Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

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Exchange-coupling behavior in soft/hard Li0.3Co0.5Zn0.2Fe2O4/SrFe12O19 core/shell composite synthesized by the two-step ball-milling-assisted ceramic process

Cited by 13 publications

References 44 publications

Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

Functional Sr0.5Ba0.5Sm0.02Fe11.98O4/x(Ni0.8Zn0.2Fe2O4) Hard–Soft Ferrite Nanocomposites: Structure, Magnetic and Microwave Properties

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr0.5Ba0.5ScxFe12‐xO19/NiFe2O4 Hard/Soft Nanocomposites

Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

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Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites