Spin canting effect and microwave absorption properties of Sm–Mn substituted nanosized material

Sadiq, Imran; Naseem, Shahzad; Ashiq, Muhammad Naeem; Iqbal, Muhammad Asif; Ali, Irshad; Khan, Muhammad Azhar; Niaz, Shanawar; Rana, M.U.

doi:10.1016/j.jmmm.2015.04.118

Cited by 37 publications

(6 citation statements)

References 28 publications

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“…In addition, the magnetization of HPFN continuously increased along with the increase in the applied magnetic eld at 3 K, which may have been due to the enhanced spin canting effect of Gd 3+ in HPFN. 30,31 In addition, the hysteresis at 3 K indicated that the nanonetworks possessed superparamagnetism. Standard zero-eld cooling (ZFC) and eld cooling (FC) measurements of HPFN displayed similar curves compared to those of paramagnetic Gd 2 O 3 at a low temperature, but gradually became similar to the curves of superparamagentic Fe 3 O 4 with an increase in temperature (Fig.…”

Section: Synthesis and Characterization Of Hpfnmentioning

confidence: 99%

Development of hollow ferrogadolinium nanonetworks for dual-modal MRI guided cancer chemotherapy

Tang

Sun

et al. 2019

RSC Adv.

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Section: Synthesis and Characterization Of Hpfnmentioning

confidence: 99%

Development of hollow ferrogadolinium nanonetworks for dual-modal MRI guided cancer chemotherapy

Tang

Sun

et al. 2019

RSC Adv.

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“…Their serial articles of "Sr 2 Ni 2 X" also show the X-ray diffraction figures with no fingerprint peaks of the X-type ferrite. [17][18][19][20] Hakimi described that the X-ray diffraction pattern of "Sr 2 CuMgFe 28 O 46 " did not conform to any of the patterns of the M-, W-, Y-, Z-, and U-type hexaferrites. 10 However, the diffraction pattern of (d) "Sr 2 CuMgX" is consistent with that of (e) SrM (SrFe 12 O 19 ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and magnetic characterization of Sr-based Ni2X-type hexaferrite

et al. 2015

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“…For samples synthesized through the ultrasonication route, M max are in the ranges of 43.84-53. 36 and 73.30-83.03 emu/g at 300 and 10 K, respectively (Table 2). Nevertheless, it is obvious that an applied field of ±10 kOe is not enough to saturate the prepared samples.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, it has been reported that the larger content of rare earth ions gradually alters the magnetization from collinear spins to non-collinear spins of Fe 3+ ions, and hence decreases the magnetization [30,36]. Sadiq et al [36] claimed that the doping with RE elements could reduce the strength of super-exchange interactions among Fe 3+ -O-Fe 3+ , leading to spin-canting or non-collinear arrangement of magnetic moments. The decrease in magnetization could be also attributed to the formation of secondary phases of Fe 2 O 3 , as observed in the XRD investigation.…”

Section: Magnetic Investigationsmentioning

confidence: 99%

Impacts of Sol-Gel Auto-Combustion and Ultrasonication Approaches on Structural, Magnetic, and Optical Properties of Sm-Tm Co-Substituted Sr0.5Ba0.5Fe12O19 Nanohexaferrites: Comparative Study

et al. 2020

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In this paper, we introduced a comparative study of Sm-Tm-substituted Sr-Ba nanohexaferrites (NHFs), Sr0.5Ba0.5TmxSmxFe12−2xO19 with x = 0.00–0.05, manufactured via both citrate sol-gel auto-combustion and ultrasonication approaches. The phase formation of M-type hexaferrite (HF) for both compositions was confirmed by X-ray diffraction (XRD) powder pattern, Fourier-transform infrared (FT-IR) spectra, scanning and transmission electron microscopy (SEM and TEM) micrographs, energy dispersive X-ray (EDX) spectra, and elemental mappings. The magnetic properties at room temperature (RT) and low temperature (T = 10 K) were also investigated. M-H loops revealed ferrimagnetic nature for various prepared nanohexaferrites via sol-gel and ultrasonication routes. The Ms (saturation magnetization) and Mr (remanence) values increased with increasing Tm-Sm substituting contents. Ms and Mr reached their maximum values at x = 0.04 in the case of samples prepared using the sol-gel technique and at x = 0.03 for those prepared via ultrasonication route. M-H loops were very broad in samples prepared via ultrasonication route in comparison to those produced by means of the sol-gel approach, implying that the products synthesized via ultrasonication route have greater values of coercivity (Hc). The variations in Hc values with respect to Tm-Sm substitutions were governed by the evolutions in the magneto-crystalline anisotropy. Diffuse reflectance spectra (DRS) were employed to estimate the direct band gap of pristine and co-substituted Sr0.5Ba0.5Fe12O19 hexaferrites. Optical energy band gaps (Eg) of pristine samples were significantly tuned by co-substitution of Tm3+ and Sm3+ ions. Eg values of the Sr0.5Ba0.5Fe12O19 sample, which was synthesized using the sol-gel method, decreased almost linearly from 1.75 to 1.45 eV by increasing co-doped ion content. However, we observed a sharp drop from 1.85 eV to an average of 1.50 eV for the samples, which were synthesized using the ultrasonication approach.

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Spin canting effect and microwave absorption properties of Sm–Mn substituted nanosized material

Cited by 37 publications

References 28 publications

Development of hollow ferrogadolinium nanonetworks for dual-modal MRI guided cancer chemotherapy

Development of hollow ferrogadolinium nanonetworks for dual-modal MRI guided cancer chemotherapy

Synthesis and magnetic characterization of Sr-based Ni2X-type hexaferrite

Impacts of Sol-Gel Auto-Combustion and Ultrasonication Approaches on Structural, Magnetic, and Optical Properties of Sm-Tm Co-Substituted Sr0.5Ba0.5Fe12O19 Nanohexaferrites: Comparative Study

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