AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni1-xZnxFe2O4 nanoparticles

Antony Adair; Jose T.Elizalde Galindo; Cristian Botez; Verónica Corral Flores; Dario Bueno Baques; Luis Fuentes Cobas; José A. Matutes-Aquino

doi:10.1557/proc-0962-p10-18

AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni_1-xZn_xFe₂O₄ nanoparticles

Antony Adair, Jose T.Elizalde Galindo, Cristian Botez, Verónica Corral Flores, Dario Bueno Baques, Luis Fuentes Cobas, José A. Matutes-Aquino

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We present preliminary results from AC-susceptibility experiments aimed at investigating the superparamagnetic relaxation in systems of Ni _1-xZn_xFe₂O₄ nanoparticles (average size 〈D〉=7±3 nm) as a function of the Zn content x (0≤ x ≤0.75). We obtained the average blocking temperature 〈T _B〉 from the characteristic temperature dependence of the imaginary susceptibility χ_imag and we found that the relationship between the observation time τ_obs and the blocking temperature is excellently described by an Arhenius-type law τ_obs = τ₀ exp(U_eff /k_B〈T_B〉). The effective energy barrier to magnetization reversal U_eff exhibits a strong dependence on the Zn content x, with a pronounced maximum for x=0.5. The average blocking temperature (measured in an 100 Hz oscillating field) exhibits a similar behavior. Our results illustrate the ability to control the superparamagnetic relaxation of ferromagnetic spinel nanoparticles through chemical manipulation.

Original language	English (US)
Title of host publication	Nanoscale Magnets
Subtitle of host publication	Synthesis, Self-Assembly, Properties and Applications
Publisher	Materials Research Society
Pages	86-90
Number of pages	5
ISBN (Print)	9781604234145
DOIs	https://doi.org/10.1557/proc-0962-p10-18
State	Published - 2006
Externally published	Yes
Event	2006 MRS Fall Meeting - Boston, MA, United States Duration: Nov 27 2006 → Dec 1 2006

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	962
ISSN (Print)	0272-9172

Conference

Conference	2006 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	11/27/06 → 12/1/06

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/proc-0962-p10-18

Cite this

Adair, A., Galindo, J. T. E., Botez, C., Flores, V. C., Baques, D. B., Cobas, L. F., & Matutes-Aquino, J. A. (2006). AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni_1-xZn_xFe₂O₄ nanoparticles. In Nanoscale Magnets: Synthesis, Self-Assembly, Properties and Applications (pp. 86-90). (Materials Research Society Symposium Proceedings; Vol. 962). Materials Research Society. https://doi.org/10.1557/proc-0962-p10-18

AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni_1-xZn_xFe₂O₄ nanoparticles. / Adair, Antony; Galindo, Jose T.Elizalde; Botez, Cristian et al.
Nanoscale Magnets: Synthesis, Self-Assembly, Properties and Applications. Materials Research Society, 2006. p. 86-90 (Materials Research Society Symposium Proceedings; Vol. 962).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Adair, A, Galindo, JTE, Botez, C, Flores, VC, Baques, DB, Cobas, LF & Matutes-Aquino, JA 2006, AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni_1-xZn_xFe₂O₄ nanoparticles. in Nanoscale Magnets: Synthesis, Self-Assembly, Properties and Applications. Materials Research Society Symposium Proceedings, vol. 962, Materials Research Society, pp. 86-90, 2006 MRS Fall Meeting, Boston, MA, United States, 11/27/06. https://doi.org/10.1557/proc-0962-p10-18

Adair A, Galindo JTE, Botez C, Flores VC, Baques DB, Cobas LF et al. AC-susceptibility measurements of the superparamagnetic relaxation in systems of Ni_1-xZn_xFe₂O₄ nanoparticles. In Nanoscale Magnets: Synthesis, Self-Assembly, Properties and Applications. Materials Research Society. 2006. p. 86-90. (Materials Research Society Symposium Proceedings). doi: 10.1557/proc-0962-p10-18

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abstract = "We present preliminary results from AC-susceptibility experiments aimed at investigating the superparamagnetic relaxation in systems of Ni 1-xZnxFe2O4 nanoparticles (average size 〈D〉=7±3 nm) as a function of the Zn content x (0≤ x ≤0.75). We obtained the average blocking temperature 〈T B〉 from the characteristic temperature dependence of the imaginary susceptibility χimag and we found that the relationship between the observation time τobs and the blocking temperature is excellently described by an Arhenius-type law τobs = τ0 exp(Ueff /kB〈TB〉). The effective energy barrier to magnetization reversal Ueff exhibits a strong dependence on the Zn content x, with a pronounced maximum for x=0.5. The average blocking temperature (measured in an 100 Hz oscillating field) exhibits a similar behavior. Our results illustrate the ability to control the superparamagnetic relaxation of ferromagnetic spinel nanoparticles through chemical manipulation.",

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AB - We present preliminary results from AC-susceptibility experiments aimed at investigating the superparamagnetic relaxation in systems of Ni 1-xZnxFe2O4 nanoparticles (average size 〈D〉=7±3 nm) as a function of the Zn content x (0≤ x ≤0.75). We obtained the average blocking temperature 〈T B〉 from the characteristic temperature dependence of the imaginary susceptibility χimag and we found that the relationship between the observation time τobs and the blocking temperature is excellently described by an Arhenius-type law τobs = τ0 exp(Ueff /kB〈TB〉). The effective energy barrier to magnetization reversal Ueff exhibits a strong dependence on the Zn content x, with a pronounced maximum for x=0.5. The average blocking temperature (measured in an 100 Hz oscillating field) exhibits a similar behavior. Our results illustrate the ability to control the superparamagnetic relaxation of ferromagnetic spinel nanoparticles through chemical manipulation.

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