Exchange spring magnetic behavior in BaFe12O19/Fe3O4 nanocomposites

Remya, K. P.; Prabhu, D.; Amirthapandian, S.; Viswanathan, C.; Ponpandian, N.

doi:10.1016/j.jmmm.2016.01.024

Cited by 47 publications

(13 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the presence of α-Fe2O3 phase could be a reason for the decreasing of coercivity. This result has been found in the SrFe12O19/CoFe2O4 [17], BaFe12O19/Fe3O4 [19] and BaFe12O19/Ni0.5Zn0.5Fe2O4 [20]. The value of coercivity HC markedly decreases from 3.6 kOe to 1.44 kOe while the magnetization M increases from 54.02 emu/g to 71.81 emu/g when the ratio RV decreases from 1:1 to 1:7 (table 2).…”

Section: Resultssupporting

confidence: 69%

Structure and Magnetic Properties of SrFe12O19/CoFe2O4 Nanocomposite Ferrite

Nga¹,

Lan²,

Loan³

et al. 2019

MaP

View full text Add to dashboard Cite

Nanocomposite particles SrFe12O19/ CoFe2O4 were synthesized by sol-gel method. The nanocomposites are formed at the calcining temperature around 850 oC in 5 hours. The phase composition, surface morphology and magnetic properties of the nanocomposites were investigated using XRD, SEM and VSM, respectively. The results show that the magnetic properties of nanocomposite particles are strongly influenced by the molar ratios of the hard and soft phases and particle size distributions. The samples with the mass ratio of Rm= SrFe12O19/ NiFe2O4 = 1/3 and 1/5 are characterized with a “bee waist” type hysteresis loop. While all the samples RV show an excellent smooth hysteresis loop and a single – phase magnetization behavior. The coercivity decreases significantly and the magnetization drastically increases with decreasing of volume ratio RV. Keywords: nanocomposite, sol- gel method, exchange coupling.

show abstract

Section: Resultssupporting

confidence: 69%

Structure and Magnetic Properties of SrFe12O19/CoFe2O4 Nanocomposite Ferrite

Nga¹,

Lan²,

Loan³

et al. 2019

MaP

View full text Add to dashboard Cite

show abstract

“…Moreover, no enhancement of the remanence was observed, which should be characteristic for exchange-coupled BaM composites regardless of the simultaneous H C change. [86][87][88][89] Final remanence value was always proportional to the coercivity, as shown before, and the highest H C was observed for sample BaM_10_4, which was also visibly less coupled than BaM_10_1 (see in the ESI for the comparison of the dM/dH curves †). On the other hand, the same sample also possessed visibly larger grains than BaM_10_1, suggesting that observed particles size was still signicant for the nal properties.…”

Section: Magnetic Properties and Microstructuresupporting

confidence: 74%

“…For a BaFe 12 O 19 , coupling with a so magnetic phase could lead to a coercivity loss. 86,87 However, the nal properties should heavily depend on the fraction of both phases. As throughout the Fe 3+ /Ba 2+ ¼ 8 and 10 series, no strong dependence between magnetic properties and synthesis conditions was observed, and therefore between possible Ba content, it seems unlikely that similar coupling is mostly responsible for observed H C loss.…”

Section: Magnetic Properties and Microstructurementioning

confidence: 99%

Pseudo-superparamagnetic behaviour of barium hexaferrite particles

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Generally, one sharp peak indicates single-phase-like behavior of the bimagnetic composite based on exchange-coupling, whereas two distinct peaks represent a decoupled bimagnet having homologous values near to the coercivity of the individual magnetic phases . All of the δ M /δ H curves for the Sm 2 Co 17 /Co(Fe) nanofibers with different ratios exhibit a broad single peak, suggesting strong exchange-coupling in the prepared samples, as shown in Figures e, h …”

Section: Results and Discussionmentioning

confidence: 99%

Phase- and Composition-Tunable Hard/Soft Magnetic Nanofibers for High-Performance Permanent Magnet

Lee

Hwang

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

An exchange-spring magnet is a next-generation permanent magnetic model that possesses a synergistic effect of single-phased hard and soft magnets, thereby giving rise to enhanced magnetic performance. However, in spring magnet preparation thus far, it has remained a challenge to manipulate the magnetic properties via the exchange-coupling effect due to the lack of a synthetic method that enables the hard/soft interfacial magnetic interaction in a homogeneous manner. Here, we report an in situ approach for the synthesis of a phase-and composition-tunable SmCo-based spring magnet based on a binary phase system. This is the first reported systematic and prospective approach to spring magnet preparation. An electrospinning technique with the use of a composition-tunable precursor enables the fabrication of bimagnetic nanofibers with a precisely controlled hard/soft magnet volume ratio (0 to 100%) and a good number of interfacial sites, leading to an effective magnetic coupling interaction. On the basis of a microstructural study and qualitative magnetic measurements, we demonstrate an enhancement in magnetic performance for binary-phased fibers and clearly manifest the elucidation of the exchange-coupling effect between nanograins across the interface in the one-dimensional nanomagnet. We envision that this work can provide a potential approach to develop exchange-coupled spring magnet and moreover, offering an ideal model to understand the nanomagnetism of a well-constructed one-dimensional spring nanostructure.

show abstract

Exchange spring magnetic behavior in BaFe12O19/Fe3O4 nanocomposites

Cited by 47 publications

References 46 publications

Structure and Magnetic Properties of SrFe12O19/CoFe2O4 Nanocomposite Ferrite

Structure and Magnetic Properties of SrFe12O19/CoFe2O4 Nanocomposite Ferrite

Pseudo-superparamagnetic behaviour of barium hexaferrite particles

Phase- and Composition-Tunable Hard/Soft Magnetic Nanofibers for High-Performance Permanent Magnet

Contact Info

Product

Resources

About