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

研究成果: Article査読

23 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号252505
ジャーナルApplied Physics Letters
98
25
DOI
出版ステータスPublished - 2011 6月 20

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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