Structure and magnetic properties of nanocrystalline ferrimagnetic CdFe2O4 spinel

C. N. Chinnasamy; A. Narayanasamy; N. Ponpandian; R. Justin Joseyphus; K. Chattopadhyay; K. Shinoda; B. Jeyadevan; K. Tohji; K. Nakatsuka; H. Guérault; J. M. Greneche

doi:10.1016/S1359-6462(01)00846-6

Structure and magnetic properties of nanocrystalline ferrimagnetic CdFe₂O₄ spinel

C. N. Chinnasamy, A. Narayanasamy, N. Ponpandian, R. Justin Joseyphus, K. Chattopadhyay, K. Shinoda, B. Jeyadevan, K. Tohji, K. Nakatsuka, H. Guérault, J. M. Greneche

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The nanocrystalline CdFe₂O₄ with various grain sizes were synthesized by ball milling in bulk material. The magnetization measurements reveal a spin-glass like surface structure and the material is found to have a large anisotropy. Mossbauer effect experiment at 10 K in an external magnetic field of 6 T applied parallel to the direction of gamma rays could clearly show that CdFe₂O₄ behaves like a mixed spinel on reducing the grain size to a few nanometers and that it exhibits ferrimagnetic ordering. Fe³⁺ spins at both the sites exhibit spin canting. The cation inversion is found to increase with decrease in grain size.

Original language	English
Pages (from-to)	1411-1415
Number of pages	5
Journal	Scripta Materialia
Volume	44
Issue number	8-9
DOIs	https://doi.org/10.1016/S1359-6462(01)00846-6
Publication status	Published - 2001 May 18

Keywords

Ferrites
Mechanical alloying
Mössbauer effect
Nanostructure
Spin-glass

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/S1359-6462(01)00846-6

Cite this

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title = "Structure and magnetic properties of nanocrystalline ferrimagnetic CdFe2O4 spinel",

abstract = "The nanocrystalline CdFe2O4 with various grain sizes were synthesized by ball milling in bulk material. The magnetization measurements reveal a spin-glass like surface structure and the material is found to have a large anisotropy. Mossbauer effect experiment at 10 K in an external magnetic field of 6 T applied parallel to the direction of gamma rays could clearly show that CdFe2O4 behaves like a mixed spinel on reducing the grain size to a few nanometers and that it exhibits ferrimagnetic ordering. Fe3+ spins at both the sites exhibit spin canting. The cation inversion is found to increase with decrease in grain size.",

keywords = "Ferrites, Mechanical alloying, M{\"o}ssbauer effect, Nanostructure, Spin-glass",

author = "Chinnasamy, {C. N.} and A. Narayanasamy and N. Ponpandian and Joseyphus, {R. Justin} and K. Chattopadhyay and K. Shinoda and B. Jeyadevan and K. Tohji and K. Nakatsuka and H. Gu{\'e}rault and Greneche, {J. M.}",

note = "Funding Information: The authors would like to thank Dr R. Krishnan for fruitful discussions, Prof. P. R. Subramanian for his interest in this work and Dr H. Kato for the high-field magnetisation measurements. The financial assistance from UGC-SAP (Phase III) and UGC Major Research Project (F.10-32/98 (SR-I)) sanctioned to the University of Madras is gratefully acknowledged. Two of the authors (CNC and NP) would like to thank the Council of Scientific and Industrial Research, Government of India for the award of Senior Research Fellowship.",

year = "2001",

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doi = "10.1016/S1359-6462(01)00846-6",

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AU - Chinnasamy, C. N.

AU - Narayanasamy, A.

AU - Ponpandian, N.

AU - Joseyphus, R. Justin

AU - Chattopadhyay, K.

AU - Shinoda, K.

AU - Jeyadevan, B.

AU - Tohji, K.

AU - Nakatsuka, K.

AU - Guérault, H.

AU - Greneche, J. M.

N1 - Funding Information: The authors would like to thank Dr R. Krishnan for fruitful discussions, Prof. P. R. Subramanian for his interest in this work and Dr H. Kato for the high-field magnetisation measurements. The financial assistance from UGC-SAP (Phase III) and UGC Major Research Project (F.10-32/98 (SR-I)) sanctioned to the University of Madras is gratefully acknowledged. Two of the authors (CNC and NP) would like to thank the Council of Scientific and Industrial Research, Government of India for the award of Senior Research Fellowship.

PY - 2001/5/18

Y1 - 2001/5/18

N2 - The nanocrystalline CdFe2O4 with various grain sizes were synthesized by ball milling in bulk material. The magnetization measurements reveal a spin-glass like surface structure and the material is found to have a large anisotropy. Mossbauer effect experiment at 10 K in an external magnetic field of 6 T applied parallel to the direction of gamma rays could clearly show that CdFe2O4 behaves like a mixed spinel on reducing the grain size to a few nanometers and that it exhibits ferrimagnetic ordering. Fe3+ spins at both the sites exhibit spin canting. The cation inversion is found to increase with decrease in grain size.

AB - The nanocrystalline CdFe2O4 with various grain sizes were synthesized by ball milling in bulk material. The magnetization measurements reveal a spin-glass like surface structure and the material is found to have a large anisotropy. Mossbauer effect experiment at 10 K in an external magnetic field of 6 T applied parallel to the direction of gamma rays could clearly show that CdFe2O4 behaves like a mixed spinel on reducing the grain size to a few nanometers and that it exhibits ferrimagnetic ordering. Fe3+ spins at both the sites exhibit spin canting. The cation inversion is found to increase with decrease in grain size.

KW - Ferrites

KW - Mechanical alloying

KW - Mössbauer effect

KW - Nanostructure

KW - Spin-glass

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