Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy

Daiji Hasegawa; Satoshi Nakasaka; Tomoyuki Ogawa; Migaku Takahashi; Masahiro Sato

doi:10.1109/TMAG.2006.879886

Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy

Daiji Hasegawa, Satoshi Nakasaka, Tomoyuki Ogawa, Migaku Takahashi, Masahiro Sato

ENG - Electronic Engineering

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

19 Citations (Scopus)

Abstract

To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, K_u^grain. Using this material, both high ferromagnetic resonance frequency, f_r, and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, f_bcan be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir₁₇nanogranular with negative K_u^grain, it is verified that the nanoparticles with negative K_u^grainhave superparamagnetic properties only in the c-plane.

Original language	English
Pages (from-to)	2805-2807
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	42
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2006.879886
Publication status	Published - 2006 Oct

Keywords

Blocking frequency
h.c.p. Co-Ir
negative uniaxial anisotropy
superparamagnetic nanoparticles

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10.1109/TMAG.2006.879886

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title = "Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy",

abstract = "To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, Kugrain. Using this material, both high ferromagnetic resonance frequency, fr, and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, fbcan be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir17nanogranular with negative Kugrain, it is verified that the nanoparticles with negative Kugrainhave superparamagnetic properties only in the c-plane.",

keywords = "Blocking frequency, h.c.p. Co-Ir, negative uniaxial anisotropy, superparamagnetic nanoparticles",

author = "Daiji Hasegawa and Satoshi Nakasaka and Tomoyuki Ogawa and Migaku Takahashi and Masahiro Sato",

year = "2006",

month = oct,

doi = "10.1109/TMAG.2006.879886",

language = "English",

volume = "42",

pages = "2805--2807",

journal = "IEEE Transactions on Magnetics",

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TY - JOUR

T1 - Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy

AU - Hasegawa, Daiji

AU - Nakasaka, Satoshi

AU - Ogawa, Tomoyuki

AU - Takahashi, Migaku

AU - Sato, Masahiro

PY - 2006/10

Y1 - 2006/10

N2 - To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, Kugrain. Using this material, both high ferromagnetic resonance frequency, fr, and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, fbcan be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir17nanogranular with negative Kugrain, it is verified that the nanoparticles with negative Kugrainhave superparamagnetic properties only in the c-plane.

AB - To increase the superparamagnetic blocking frequency, we propose magnetic nanoparticles with negative uniaxial magnetocrystalline anisotropy, Kugrain. Using this material, both high ferromagnetic resonance frequency, fr, and low magnetic potential height, ΔE, can be satisfied simultaneously. Thus, fbcan be greatly improved. From the results of DC magnetization. process of highly oriented h.c.p. C083Ir17nanogranular with negative Kugrain, it is verified that the nanoparticles with negative Kugrainhave superparamagnetic properties only in the c-plane.

KW - Blocking frequency

KW - h.c.p. Co-Ir

KW - negative uniaxial anisotropy

KW - superparamagnetic nanoparticles

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DO - 10.1109/TMAG.2006.879886

M3 - Article

AN - SCOPUS:85008014604

SN - 0018-9464

VL - 42

SP - 2805

EP - 2807

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 10

ER -

Magnetization process of h.c.p.-CoIr nanoparticles with negative uniaxial magnetocrystalline anisotropy

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Keywords

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