Spin-glasslike behavior of magnetic ordered state originating from strong interparticle magnetostatic interaction in α-Fe nanoparticle agglomerate

Kosuke Hiroi; Hiroaki Kura; Tomoyuki Ogawa; Migaku Takahashi; Tetsuya Sato

doi:10.1063/1.3602313

Spin-glasslike behavior of magnetic ordered state originating from strong interparticle magnetostatic interaction in α-Fe nanoparticle agglomerate

Kosuke Hiroi, Hiroaki Kura, Tomoyuki Ogawa, Migaku Takahashi, Tetsuya Sato

ENG - Electronic Engineering

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

24 Citations (Scopus)

Abstract

In strongly interacting nanoparticle agglomerate through dipolar coupling, prepared using chemically synthesized α-Fe nanoparticle, the temperature Tpeak at which the zero-field-cooled magnetization exhibits its peak reaches 385 K. This indicates that the magnetic ordering appears above room temperature. Aging phenomena and memory effect observed below Tpeak are intrinsically same as that of spin glasses. The appearance of spin-glasslike behavior near room temperature should be attributed to the three-dimensional interparticle coupling that is purely magnetostatic.

Original language	English
Article number	252505
Journal	Applied Physics Letters
Volume	98
Issue number	25
DOIs	https://doi.org/10.1063/1.3602313
Publication status	Published - 2011 Jun 20

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3602313

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title = "Spin-glasslike behavior of magnetic ordered state originating from strong interparticle magnetostatic interaction in α-Fe nanoparticle agglomerate",

abstract = "In strongly interacting nanoparticle agglomerate through dipolar coupling, prepared using chemically synthesized α-Fe nanoparticle, the temperature Tpeak at which the zero-field-cooled magnetization exhibits its peak reaches 385 K. This indicates that the magnetic ordering appears above room temperature. Aging phenomena and memory effect observed below Tpeak are intrinsically same as that of spin glasses. The appearance of spin-glasslike behavior near room temperature should be attributed to the three-dimensional interparticle coupling that is purely magnetostatic.",

author = "Kosuke Hiroi and Hiroaki Kura and Tomoyuki Ogawa and Migaku Takahashi and Tetsuya Sato",

note = "Funding Information: This work was partially supported by the Keio University Doctoral Student Grant-in-Aid Program and the Grant-Aid for Doctoral Student Program from the Keio Leadingedge Laboratory of Science and Technology (No. 10–010).",

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AU - Hiroi, Kosuke

AU - Kura, Hiroaki

AU - Ogawa, Tomoyuki

AU - Takahashi, Migaku

AU - Sato, Tetsuya

N1 - Funding Information: This work was partially supported by the Keio University Doctoral Student Grant-in-Aid Program and the Grant-Aid for Doctoral Student Program from the Keio Leadingedge Laboratory of Science and Technology (No. 10–010).

PY - 2011/6/20

Y1 - 2011/6/20

N2 - In strongly interacting nanoparticle agglomerate through dipolar coupling, prepared using chemically synthesized α-Fe nanoparticle, the temperature Tpeak at which the zero-field-cooled magnetization exhibits its peak reaches 385 K. This indicates that the magnetic ordering appears above room temperature. Aging phenomena and memory effect observed below Tpeak are intrinsically same as that of spin glasses. The appearance of spin-glasslike behavior near room temperature should be attributed to the three-dimensional interparticle coupling that is purely magnetostatic.

AB - In strongly interacting nanoparticle agglomerate through dipolar coupling, prepared using chemically synthesized α-Fe nanoparticle, the temperature Tpeak at which the zero-field-cooled magnetization exhibits its peak reaches 385 K. This indicates that the magnetic ordering appears above room temperature. Aging phenomena and memory effect observed below Tpeak are intrinsically same as that of spin glasses. The appearance of spin-glasslike behavior near room temperature should be attributed to the three-dimensional interparticle coupling that is purely magnetostatic.

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Spin-glasslike behavior of magnetic ordered state originating from strong interparticle magnetostatic interaction in α-Fe nanoparticle agglomerate

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