High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite

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High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite. / Stingaciu, Marian; Mishra, Durgamadhab; de Julián Fernández, César; Cabassi, Riccardo; Eikeland, Anna Zink; Christensen, Mogens; Deledda, Stefano.

In: Journal of Alloys and Compounds, Vol. 883, 160768, 11.2021.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Stingaciu, M, Mishra, D, de Julián Fernández, C, Cabassi, R, Eikeland, AZ, Christensen, M & Deledda, S 2021, 'High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite', Journal of Alloys and Compounds, vol. 883, 160768. https://doi.org/10.1016/j.jallcom.2021.160768

APA

Stingaciu, M., Mishra, D., de Julián Fernández, C., Cabassi, R., Eikeland, A. Z., Christensen, M., & Deledda, S. (2021). High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite. Journal of Alloys and Compounds, 883, [160768]. https://doi.org/10.1016/j.jallcom.2021.160768

CBE

Stingaciu M, Mishra D, de Julián Fernández C, Cabassi R, Eikeland AZ, Christensen M, Deledda S. 2021. High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite. Journal of Alloys and Compounds. 883:Article 160768. https://doi.org/10.1016/j.jallcom.2021.160768

MLA

Vancouver

Stingaciu M, Mishra D, de Julián Fernández C, Cabassi R, Eikeland AZ, Christensen M et al. High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite. Journal of Alloys and Compounds. 2021 Nov;883. 160768. https://doi.org/10.1016/j.jallcom.2021.160768

Author

Stingaciu, Marian ; Mishra, Durgamadhab ; de Julián Fernández, César ; Cabassi, Riccardo ; Eikeland, Anna Zink ; Christensen, Mogens ; Deledda, Stefano. / High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite. In: Journal of Alloys and Compounds. 2021 ; Vol. 883.

Bibtex

@article{aadb511a6b624091bfb8baa8b0a770a3,
title = "High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite",
abstract = "The structural and magnetic properties of Sr0.67Ca0.33Fe9Al3−xCrxO19 submicrometric powders with substitution levels ranging from x = 0 up to x = 3, prepared by sol-gel synthesis method, have been investigated. The powders were characterized by high resolution synchrotron X-ray diffraction, scanning electron microscopy, powder neutron diffraction and MPMS-SQUID magnetometer. The structural analysis shows that upon Ca-substitution of SrFe12O19 at the Sr site and Al–Cr at the Fe sites, the magnetoplumbite structure is preserved, even for large levels of substitutions. The X-ray powder diffraction peak broadening and Williamson-Hall plots analyses indicate an increase of crystallites size and relaxation of the microstrain with increasing amounts of Chromium. The magnetic hysteresis loops reveal high coercivity fields at room temperature, with the highest value of HC = 1125 kA/m (1.41 T) obtained for Sr0.67Ca0.33Fe9Al2.5Cr0.5O19 powder interesting to develop free-Rare Earth high coercivity magnets. The saturation magnetization and remanence values increase monotonically with increasing Cr content while the switching field decreases. The structural Rietveld refinement of combined X-ray/neutron diffraction data shows the affinity of Al3+ and Cr3+ cations to migrate mainly towards (2a) Fe-Oh2 and (12k) Fe-Oh3 sites and only minor amounts is found on the (4f1) Fe-Oh1 octahedral sites. The structural observations corroborate the magnetic properties, demonstrating a correlation between the structure and magnetic properties in Ca–Al–Cr substituted strontium hexaferrite. The role of the particle size to maximize the coercivity properties is discussed.",
keywords = "Magnetic properties, Neutron diffraction, Sol-gel, Structure–property relationship, Substituted strontium hexaferrite, SR-HEXAFERRITE, Structure-property relationship, PARTICLE, LINE, DIFFRACTION, DEPENDENCE",
author = "Marian Stingaciu and Durgamadhab Mishra and {de Juli{\'a}n Fern{\'a}ndez}, C{\'e}sar and Riccardo Cabassi and Eikeland, {Anna Zink} and Mogens Christensen and Stefano Deledda",
note = "Publisher Copyright: {\textcopyright} 2021",
year = "2021",
month = nov,
doi = "10.1016/j.jallcom.2021.160768",
language = "English",
volume = "883",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - High magnetic coercive field in Ca-Al-Cr substituted strontium hexaferrite

AU - Stingaciu, Marian

AU - Mishra, Durgamadhab

AU - de Julián Fernández, César

AU - Cabassi, Riccardo

AU - Eikeland, Anna Zink

AU - Christensen, Mogens

AU - Deledda, Stefano

N1 - Publisher Copyright: © 2021

PY - 2021/11

Y1 - 2021/11

N2 - The structural and magnetic properties of Sr0.67Ca0.33Fe9Al3−xCrxO19 submicrometric powders with substitution levels ranging from x = 0 up to x = 3, prepared by sol-gel synthesis method, have been investigated. The powders were characterized by high resolution synchrotron X-ray diffraction, scanning electron microscopy, powder neutron diffraction and MPMS-SQUID magnetometer. The structural analysis shows that upon Ca-substitution of SrFe12O19 at the Sr site and Al–Cr at the Fe sites, the magnetoplumbite structure is preserved, even for large levels of substitutions. The X-ray powder diffraction peak broadening and Williamson-Hall plots analyses indicate an increase of crystallites size and relaxation of the microstrain with increasing amounts of Chromium. The magnetic hysteresis loops reveal high coercivity fields at room temperature, with the highest value of HC = 1125 kA/m (1.41 T) obtained for Sr0.67Ca0.33Fe9Al2.5Cr0.5O19 powder interesting to develop free-Rare Earth high coercivity magnets. The saturation magnetization and remanence values increase monotonically with increasing Cr content while the switching field decreases. The structural Rietveld refinement of combined X-ray/neutron diffraction data shows the affinity of Al3+ and Cr3+ cations to migrate mainly towards (2a) Fe-Oh2 and (12k) Fe-Oh3 sites and only minor amounts is found on the (4f1) Fe-Oh1 octahedral sites. The structural observations corroborate the magnetic properties, demonstrating a correlation between the structure and magnetic properties in Ca–Al–Cr substituted strontium hexaferrite. The role of the particle size to maximize the coercivity properties is discussed.

AB - The structural and magnetic properties of Sr0.67Ca0.33Fe9Al3−xCrxO19 submicrometric powders with substitution levels ranging from x = 0 up to x = 3, prepared by sol-gel synthesis method, have been investigated. The powders were characterized by high resolution synchrotron X-ray diffraction, scanning electron microscopy, powder neutron diffraction and MPMS-SQUID magnetometer. The structural analysis shows that upon Ca-substitution of SrFe12O19 at the Sr site and Al–Cr at the Fe sites, the magnetoplumbite structure is preserved, even for large levels of substitutions. The X-ray powder diffraction peak broadening and Williamson-Hall plots analyses indicate an increase of crystallites size and relaxation of the microstrain with increasing amounts of Chromium. The magnetic hysteresis loops reveal high coercivity fields at room temperature, with the highest value of HC = 1125 kA/m (1.41 T) obtained for Sr0.67Ca0.33Fe9Al2.5Cr0.5O19 powder interesting to develop free-Rare Earth high coercivity magnets. The saturation magnetization and remanence values increase monotonically with increasing Cr content while the switching field decreases. The structural Rietveld refinement of combined X-ray/neutron diffraction data shows the affinity of Al3+ and Cr3+ cations to migrate mainly towards (2a) Fe-Oh2 and (12k) Fe-Oh3 sites and only minor amounts is found on the (4f1) Fe-Oh1 octahedral sites. The structural observations corroborate the magnetic properties, demonstrating a correlation between the structure and magnetic properties in Ca–Al–Cr substituted strontium hexaferrite. The role of the particle size to maximize the coercivity properties is discussed.

KW - Magnetic properties

KW - Neutron diffraction

KW - Sol-gel

KW - Structure–property relationship

KW - Substituted strontium hexaferrite

KW - SR-HEXAFERRITE

KW - Structure-property relationship

KW - PARTICLE

KW - LINE

KW - DIFFRACTION

KW - DEPENDENCE

UR - http://www.scopus.com/inward/record.url?scp=85108404085&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2021.160768

DO - 10.1016/j.jallcom.2021.160768

M3 - Journal article

AN - SCOPUS:85108404085

VL - 883

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 160768

ER -