The role of terbium cation substitution on the magnetic properties of cobalt ferrite nanoparticles

Sodaee, Tahmineh; Ghasemi, Ali; Paimozd, Ebrahim; Paesano, Andrea; Morisako, Akimitsu

doi:10.1016/j.jmmm.2012.10.050

Cited by 41 publications

(11 citation statements)

References 15 publications

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“…2(1) 2016, 03-11 www.appslett. [69][70][71]. Thus these studies show that magnetization of RE doped ferrite cannot be explained on the basis of magnetic moment of RE ions.…”

Section: Change Of Magnetic Parameters On the Basis Of Magnetic Momenmentioning

confidence: 73%

See 1 more Smart Citation

Solubility limit, magnetic interaction and conduction mechanism in rare earth doped spinel ferrite

Singh¹,

Kumar²,

Srivastava³

et al. 2016

Appl. Sci. Lett.

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In present review we have focused various issues like solubility limit, magnetic interaction and conduction mechanism of rare earth doped ferrite. Cumulative effects of valence state, magnetic moments of rare earth ions, weakening/strengthening of exchange interaction and magnetic ordering in rare earth ion doped ferrite are responsible for magnetic behavior. It is proposed that characterization techniques based on synchrotron radiation like X-ray absorption spectroscopy and X-ray magnetic circular dichroism can open pathways to prove these assumptions.Keywords: Rare earth, ferrites, magnetic interaction, valence state 1.INTRODUCTIONSpinel ferrites are ferrimagnetic material which have numerous technological applications [1][2][3]. Moreover, nanoparticles of these ferrites are being utilized in high-density magnetic information storage, magnetic resonance imaging, drug delivery etc. [4][5][6]. These several applications are based on magnetic and electrical behavior of ferrites [1][2][3][4][5][6]. These properties depend on various factors like, ionic radii, nature of hybridization, presence of doped atom in host lattice apart from the particle size [7][8][9][10]. Thus, research is being carried out for doped ferrite systems in order to understand the altered behavior and to optimize them for different applications [11][12][13][14][15]. In recent years, rare earth (RE) doped ferrites become interesting due to their superiority for various applications over other doped ferrite systems [17][18][19][20][21][22]. These systems become radioactive and exhibit potentential for biomedical applications [19] along-with efficient tumor passive targeting [23]. Improved capability of dye removal [24], waste water treatment [25], degradation of organic pollutants through photocatalytic activity [26] are other important fields of utilization of these ferrites. These ferrites exhibit enhanced magneto optical kerr (MOKE) effect [20] and excellent microwave absorption properties [21,22]. Thus, these ferrites cover a wide range of applications chiefly based on their magnetic characteristics [17][18][19][20][21][22][23][24][25]. However, there is lack of understanding of magnetic interaction, conduction mechanism inside these ferrites [15,16]. Thus purpose of this review article is to discuss these issues and to give prospects for future research in this direction. SPINEL FERRITEThe general formula for spinel ferrite is MO:Fe2O3 where, M is a divalent transition metal ion. Spinel name is given due to resemblance of structure of these ferrites with mineral spinel MgO.Al2O3. In this structure, oxygen ions are packed quite close together in face centred cubic arrangement and metal ions occupy spaces between them (Fig. 1). These spaces are categorized as tetrahedral (A) and octahedral (B) sites when surrounded by four and six oxygen ions respectively (Fig. 1).In a unit cell of spinel ferrite, there exists 64 and 32 A and B-sites respectively. Only 1/8 th and 1/2 th of A and B-sites are occupied [27]. Metal ions are distributed among A a...

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“…2(1) 2016, 03-11 www.appslett. [69][70][71]. Thus these studies show that magnetization of RE doped ferrite cannot be explained on the basis of magnetic moment of RE ions.…”

Section: Change Of Magnetic Parameters On the Basis Of Magnetic Momenmentioning

confidence: 73%

“…Tb 3+ ions prefer tetrahedral site when doped in cobalt ferrite as investigated using Mössbauer spectroscopic study [85]. Cation redistribution occurs after introduction of RE ions to cobalt ferrite lattice [86].…”

Section: 24distribution Of Re 3+ and Other Metal Ions In Re Doped mentioning

confidence: 99%

Solubility limit, magnetic interaction and conduction mechanism in rare earth doped spinel ferrite

Singh¹,

Kumar²,

Srivastava³

et al. 2016

Appl. Sci. Lett.

View full text Add to dashboard Cite

show abstract

“…Cobalt ferrite (CoFe 2 O 4 ) nanoparticles, a well-known hard magnetic spinel ferrite, show unique properties such as strong magneto-crystalline anisotropy, high coercivity (H C ) and large magneto-optical coefficients at a room temperature. These properties, along with their great physical and chemical stability, make CoFe 2 O 4 nanoparticles suitable for magnetic recording applications and new generation electronic devices [3][4][5]. Pure and bulk cobalt ferrite has inverse spinel structure, where Co 2+ ions have preference for the octahedral site (B) while Fe 3+ ions distribute equally between tetrahedral [A] and octahedral sites [6].…”

Section: Introductionmentioning

confidence: 99%

The role of pH on the particle size and magnetic consequence of cobalt ferrite

Safi

Ghasemi

Razavi

et al. 2015

Journal of Magnetism and Magnetic Materials

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109

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“…The materials prepared by surfactant based method have huge applications in the biomedical field. Sumithra et al, [98] developed cobalt ferrite nanoparticles for biomedical applications. Cobalt ferrite nanoparticles were studied for specific DNA biosensing.…”

Section: Cobalt Ferrite Biomedicine Applicationsmentioning

confidence: 99%

A Review on Synthesis, Properties and Applications on Cobalt Ferrite

Kashid¹,

Suresh²,

Mathad³

et al. 2022

IJASE

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Cobalt ferrite has attracted much attention owing to its excellent properties and huge technological applications. The novel synthesis methods such as co-precipitation method, solid state method, sol-gel method, auto combustion method, precursor technique, hydrothermal technique, spray pyrolysis technique etc. have been used for its preparation. Along with numerous outstanding properties of cobalt ferrite several chemical modifications like modifying reaction conditions, substituting one or more ions with other metal ions enhanced the configuration of grains of cobalt ferrite. With all the factors the role of dopant in chemical composition is extreme important because it modifies the structural, electrical, magnetic and catalytic properties of cobalt ferrite. In this review, we summarize the synthesis and properties of cobalt ferrites with significant developments. The applications of cobalt ferrite in several fields are also highlighted in this review.

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The role of terbium cation substitution on the magnetic properties of cobalt ferrite nanoparticles

Cited by 41 publications

References 15 publications

Solubility limit, magnetic interaction and conduction mechanism in rare earth doped spinel ferrite

Solubility limit, magnetic interaction and conduction mechanism in rare earth doped spinel ferrite

The role of pH on the particle size and magnetic consequence of cobalt ferrite

A Review on Synthesis, Properties and Applications on Cobalt Ferrite

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