Crystal structure and zinc location in the BaZnFe6O11 Y-type hexagonal ferrite

Collomb, A.; Müller, J.; Guitel, J. C.; Desvignes, J.M.

doi:10.1016/0304-8853(89)90089-9

Cited by 36 publications

(10 citation statements)

References 17 publications

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“…The only available data about the zinc distribution in the Ba-Fe-Zn-O mixed-layer hexaferrite subgroup is based on Mö ssbauer studies of the Z-type compound that solely indicates a preferential occupation of Zn ions in the tetrahedral sites (Lim & Kim, 2014, 2015Lim et al, 2017). Nevertheless, one report on the Y-type hexaferrite deals accurately with the zinc distribution (Collomb et al, 1989). In the Y-type structure, TST and TSTST are the only two layering types present and this study shows that their tetrahedral sites contain 71AE4% and 26AE2% of Zn 2+ , respectively.…”

Section: Figure 10mentioning

confidence: 99%

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

Delacotte

Whitehead

Pitcher

et al. 2018

Int Union Crystallogr J

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Section: Figure 10mentioning

confidence: 99%

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

Delacotte

Whitehead

Pitcher

et al. 2018

Int Union Crystallogr J

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“…The Rietveld refinement technique (Rietveld, 1969) with software suite GSAS (Larson and von Dreele, 2004) was used to determine the structure of (Ba x Sr 1− x ) 2 Co 2 Fe 12 O 22 and (Ba x Sr 1− x )Co 2 Fe 16 O 27. The structures of Ba 2 Co 2 2+ Fe 12 3+ O 22 (Collomb et al , 1989a, 1989b) and BaCo 2 2+ Fe 16 3+ O 27 (Vinnik et al , 1966; Collomb et al , 1986a, 1986b, 1986c) reported previously were used as the starting models for the refinements, respectively. The site occupancies of Co/Fe reported by Vinnik et al (1966) was used in (Ba x Sr 1− x ) Co 2 Fe 16 O 2 7 .…”

Section: Methodsmentioning

confidence: 99%

“…The Rietveld refinement technique (Rietveld, 1969) with software suite GSAS (Larson and von Dreele, 2004) (Collomb et al, 1989a(Collomb et al, , 1989b and BaCo 2 2+ Fe 16…”

Section: B X-ray Rietveld Refinements and Powder Reference Patternsmentioning

confidence: 99%

“…The Y-type (Ba 2 M 2 Fe 12 O 22 ) and W-type (Ba x Sr 1− x )Co 2 Fe 16 O 27 ) hexagonal ferrites have been synthesized for the first time back in the 1960s by Vinnik (1965; Vinnik et al 1966) during his study of the phase diagram and crystal chemistry of the BaO–CoO–Fe 2 O 3 system. The structure of Ba 2 M 2 Fe 12 O 22 ( M = Co, Zn) was characterized by Townes and Fang (1970) and Collomb et al (1989a, 1989b). The X-ray patterns for the Y-type Ba 2 Co 2 Fe 12 O 22 ferrite have been reported by Shin and Kwon (1993).…”

Section: Introductionmentioning

confidence: 99%

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X-ray powder diffraction studies of (Ba_xSr₁₋_x)₂Co₂Fe₁₂O₂₂ and (Ba_xSr₁₋_x)Co₂Fe₁₆O₂₇

Wong‐Ng

Liu²,

Yan

et al. 2015

Powder Diffr.

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X-ray structural characterization and X-ray reference powder patterns have been determined for two series of iron-and cobalt-containing layered compounds (Ba x Sr 1−x ) 2 Co 2 Fe 12 O 22 (x = 0.2, 0.4, 0.6, 0.8) and (Ba x Sr 1−x )Co 2 Fe 16 O 27 (x = 0.2, 0.4, 0.6, 0.8). The (Ba x Sr 1−x ) 2 Co 2 Fe 12 O 22 series of compounds crystallized in the space group R 3m (No. 166), with Z = 3. The structure is essentially that of the Ytype hexagonal ferrite, BaM 2+ Fe 6 3+ O 11 . The lattice parameters range from a = 5.859 15(8) to 5.843 72 (8) Å, and c = 43.4975(9) to 43.3516(9) Å for x = 0.2 to 0.8, respectively. The (Ba x Sr 1−x )Co 2 Fe 16 O 27 series (W-type hexagonal ferrite) crystallized in the space group P6 3 /mmc (No. 194) and Z = 2. The lattice parameters range from a = 5.902 05(12) to 5.8979(2) Å and c = 32.9002(10) to 32.8110(13) Å for x = 0.2 to 0.8. Results of measurements of the Seebeck coefficient and resistivity of these two sets of samples indicated that they are insulators. Powder X-ray diffraction patterns of these two series of compounds have been submitted to be included in the Powder Diffraction File.

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“…There exist only half-filled Fe 3þ (L ¼ 0, S ¼ 5=2) ions, and off-centering displacements can be considered as the origin of the nonvanishing m o as discussed in GaFeO 3 [24]. Indeed, one can find the off-centering distortions in the Y-type hexaferrite [19,25]. [20,26] Fig.…”

mentioning

confidence: 99%

Magnetic Origin of Giant Magnetoelectricity in Doped Y-type HexaferriteBa0.5Sr1.5Zn2(
Noh
¹
,
Ko
²
,
Chun
³

et al. 2015
Phys. Rev. Lett.
30
0
5
0
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We investigated site-specific magnetic behaviors of multiferroic Ba 0.5 Sr 1.5 Zn 2 ðFe 1−x Al x Þ 12 O 22 using Fe L 2;3 -edge x-ray magnetic circular dichroism. The Al dopants mostly replace the Fe 3þ ions at octahedral (O h ) sites, which contribute unquenched angular momenta through off-centering displacements. This replacement greatly reduces the magnetic anisotropy energy to change the magnetic order from a helical to a heliconical type with enhanced magnetoelectric susceptibility (α ME ). The tetrahedral (T d ) Fe sites exhibit magnetic hysteresis distinguishable from that of the O h sites, especially at low magnetic fields. These results provide essential clues for the heliconical order with a giant α ME and multibit memory effects in the Al-doped Y-type hexaferrite. Multiferroic materials, in which magnetism and ferroelectricity coexist with a cross coupling, the so-called magnetoelectric (ME) effect, have been intensively studied experimentally and theoretically over the past decade due to their potential technological applications as nextgeneration multibit memory devices [1][2][3]. The ME effect was demonstrated in various multiferroic materials such as chromates, manganites, ferrites, etc. [1-6], and spiral, cycloidal, or noncollinear helical magnetic orders were known to be essential for a large ME effect [7][8][9][10][11]. Multiferroicity is well explained by an inverse Dzyaloshinskii-Moriya interaction [12,13] or a spin-current model [14]. However, most of the materials were recognized to face the difficulty of application barriers due to the low ME response, low ME temperature, and/or the requirement of a high magnetic field. Recently, hexaferrites with several different types have attracted much attention as candidates for possible multiferroic application materials with a giant ME susceptibility (α ME ) at a relatively high temperature [4,[15][16][17], and even nonvolatile multistate behaviors were demonstrated at room temperature [18]. Particularly in Y-type hexaferrites ðBa; SrÞ 2 Zn 2 Fe 12 O 22

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Crystal structure and zinc location in the BaZnFe6O11 Y-type hexagonal ferrite

Cited by 36 publications

References 17 publications

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

X-ray powder diffraction studies of (Ba_xSr₁₋_x)₂Co₂Fe₁₂O₂₂ and (Ba_xSr₁₋_x)Co₂Fe₁₆O₂₇

Magnetic Origin of Giant Magnetoelectricity in Doped Y-type HexaferriteBa0.5Sr1.5Zn2(
Noh
¹
,
Ko
²
,
Chun
³

et al. 2015
Phys. Rev. Lett.
30
0
5
0
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Crystal structure and zinc location in the BaZnFe6O11 Y-type hexagonal ferrite

Cited by 36 publications

References 17 publications

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites

X-ray powder diffraction studies of (BaxSr1−x)2Co2Fe12O22 and (BaxSr1−x)Co2Fe16O27

Magnetic Origin of Giant Magnetoelectricity in Doped Y-type HexaferriteBa0.5Sr1.5Zn2(Noh1, Ko2, Chun3 et al. 2015Phys. Rev. Lett.30050View full textAdd to dashboardCite

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X-ray powder diffraction studies of (Ba_xSr₁₋_x)₂Co₂Fe₁₂O₂₂ and (Ba_xSr₁₋_x)Co₂Fe₁₆O₂₇

Magnetic Origin of Giant Magnetoelectricity in Doped Y-type HexaferriteBa0.5Sr1.5Zn2(
Noh
¹
,
Ko
²
,
Chun
³

et al. 2015
Phys. Rev. Lett.
30
0
5
0
View full text Add to dashboard Cite