TY - JOUR
T1 - Pd nanoparticle embedded with only one Co atom behaves as a single-particle magnet
AU - Ito, Yoshikazu
AU - Miyazaki, Akira
AU - Fukui, Ken Ichi
AU - Valiyaveettil, Suresh
AU - Yokoyama, Toshihiko
AU - Enoki, Toshiaki
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2008/10
Y1 - 2008/10
N2 - Single molecular magnets and single-particle magnets have been intensively investigated from the viewpoints of spintronics devices. We employ the giant magnetic moment effect on magnetic impurities embedded in Pd in designing a single-nanoparticle magnet. A transition metal magnetic impurity such as Co has a giant magnetic moment in Pd metal due to the exchange enhancement effect. As the interaction range of the effect is ca. 1 nm from the magnetic impurity center, all Pd atoms are spin-polarized in a Pd nanoparticle having a radius smaller than the range. Here, we unveil this feature experimentally and show that a Pd nanoparticle containing only one Co atom exhibits a single-domain nanomagnet behavior with a blocking temperature of 3K.
AB - Single molecular magnets and single-particle magnets have been intensively investigated from the viewpoints of spintronics devices. We employ the giant magnetic moment effect on magnetic impurities embedded in Pd in designing a single-nanoparticle magnet. A transition metal magnetic impurity such as Co has a giant magnetic moment in Pd metal due to the exchange enhancement effect. As the interaction range of the effect is ca. 1 nm from the magnetic impurity center, all Pd atoms are spin-polarized in a Pd nanoparticle having a radius smaller than the range. Here, we unveil this feature experimentally and show that a Pd nanoparticle containing only one Co atom exhibits a single-domain nanomagnet behavior with a blocking temperature of 3K.
KW - Co-Pd nanoparticle
KW - Exchange enhancement
KW - Giant magnetic moment
KW - Single-particle magnet
KW - Superparamagnetism
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U2 - 10.1143/JPSJ.77.103701
DO - 10.1143/JPSJ.77.103701
M3 - Article
AN - SCOPUS:54349101459
VL - 77
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 10
M1 - 103701
ER -