Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites

Jack Thomas-Hunt; Amalie Povlsen; Harikrishnan Vijayan Pillai; Cecilie Grønvaldt Knudsen; Frederik H. Gjørup; Mogens Christensen

doi:10.1039/D2DT00062H

Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites

Jack Thomas-Hunt, Amalie Povlsen, Harikrishnan Vijayan Pillai, Cecilie Grønvaldt Knudsen, Frederik H. Gjørup, Mogens Christensen^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

6 Citations (Scopus)

Abstract

Cold compacted, anisotropic shaped non-magnetically interacting precursors are used to achieve aligned strontium hexaferrites. The simple process of dry mixing platy hematite and/or rod-like goethite with strontium carbonate removes the need for external magnetic fields or high temperatures during compaction to assist in alignment. The calcined strontium hexaferrite pellets all displayed preferred orientation and high levels of phase purity (>99 wt%). The mix of goethite and strontium carbonate achieved the highest degree of magnetic alignment with Mr/Ms reaching 0.83(1) obtained by vibrating sample magnetometry. The magnetic data were supported by examining crystallographic alignment using powder X-ray diffraction as well as 2D texture synchrotron analysis.

Original language	English
Journal	Dalton Transactions
Volume	51
Issue	10
Pages (from-to)	3884-3893
DOIs	https://doi.org/10.1039/D2DT00062H
Publication status	Published - Feb 2022

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@article{d43f0605e35b469192b3572b9955fc06,

title = "Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites",

abstract = "Cold compacted, anisotropic shaped non-magnetically interacting precursors are used to achieve aligned strontium hexaferrites. The simple process of dry mixing platy hematite and/or rod-like goethite with strontium carbonate removes the need for external magnetic fields or high temperatures during compaction to assist in alignment. The calcined strontium hexaferrite pellets all displayed preferred orientation and high levels of phase purity (>99 wt%). The mix of goethite and strontium carbonate achieved the highest degree of magnetic alignment with Mr/Ms reaching 0.83(1) obtained by vibrating sample magnetometry. The magnetic data were supported by examining crystallographic alignment using powder X-ray diffraction as well as 2D texture synchrotron analysis.",

author = "Jack Thomas-Hunt and Amalie Povlsen and {Vijayan Pillai}, Harikrishnan and Knudsen, {Cecilie Gr{\o}nvaldt} and {H. Gj{\o}rup}, Frederik and Mogens Christensen",

year = "2022",

month = feb,

doi = "10.1039/D2DT00062H",

language = "English",

volume = "51",

pages = "3884--3893",

journal = "Dalton Transactions",

number = "10",

}

Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites. / Thomas-Hunt, Jack ; Povlsen, Amalie; Vijayan Pillai, Harikrishnan et al.
In: Dalton Transactions, Vol. 51, No. 10, 02.2022, p. 3884-3893.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites

AU - Thomas-Hunt, Jack

AU - Povlsen, Amalie

AU - Vijayan Pillai, Harikrishnan

AU - Knudsen, Cecilie Grønvaldt

AU - H. Gjørup, Frederik

AU - Christensen, Mogens

PY - 2022/2

Y1 - 2022/2

N2 - Cold compacted, anisotropic shaped non-magnetically interacting precursors are used to achieve aligned strontium hexaferrites. The simple process of dry mixing platy hematite and/or rod-like goethite with strontium carbonate removes the need for external magnetic fields or high temperatures during compaction to assist in alignment. The calcined strontium hexaferrite pellets all displayed preferred orientation and high levels of phase purity (>99 wt%). The mix of goethite and strontium carbonate achieved the highest degree of magnetic alignment with Mr/Ms reaching 0.83(1) obtained by vibrating sample magnetometry. The magnetic data were supported by examining crystallographic alignment using powder X-ray diffraction as well as 2D texture synchrotron analysis.

AB - Cold compacted, anisotropic shaped non-magnetically interacting precursors are used to achieve aligned strontium hexaferrites. The simple process of dry mixing platy hematite and/or rod-like goethite with strontium carbonate removes the need for external magnetic fields or high temperatures during compaction to assist in alignment. The calcined strontium hexaferrite pellets all displayed preferred orientation and high levels of phase purity (>99 wt%). The mix of goethite and strontium carbonate achieved the highest degree of magnetic alignment with Mr/Ms reaching 0.83(1) obtained by vibrating sample magnetometry. The magnetic data were supported by examining crystallographic alignment using powder X-ray diffraction as well as 2D texture synchrotron analysis.

U2 - 10.1039/D2DT00062H

DO - 10.1039/D2DT00062H

M3 - Journal article

VL - 51

SP - 3884

EP - 3893

JO - Dalton Transactions

JF - Dalton Transactions

IS - 10

ER -

Alignment of strontium hexaferrite, by cold compaction of anisotropic non-magnetically interacting crystallites

Abstract

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