TY - JOUR
T1 - Spin-glass behaviour of icosahedral Mg-Gd-Zn and Mg-Tb-Zn quasi-crystals
AU - Hattori, Y.
AU - Niikura, A.
AU - Tsai, A. P.
AU - Inoue, A.
AU - Masumoto, T.
AU - Fukamichi, K.
AU - Aruga-Katori, H.
AU - Goto, T.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - The magnetic properties of icosahedral Mg42RE8Zn50 (RE identical to Gd, Tb, Dy, Ho or Er) quasi-crystals have been investigated. These quasi-crystalline phases have a face-centred icosahedral lattice with a highly ordered Frank-Rasper-type structure as identified by electron diffraction and X-ray diffraction. The temperature dependence of DC magnetic susceptibility obeys a Curie-Weiss law in wide temperature ranges. The effective magnetic moments mu eff are close to those of free RE3+ ions and their paramagnetic Curie temperature Theta p is negative, indicating that the RE-RE exchange interactions are predominantly antiferromagnetic. The value of Theta p which is the sum of all exchange interactions is almost in proportion to the de Gennes factor. At low temperatures, spin-glass behaviour has been observed in the icosahedral Mg42Gd8Zn50 and Mg42Tb8Zn50 quasi-crystals and their spin freezing temperatures Tf are 5.5 K and 7.6 K, respectively.
AB - The magnetic properties of icosahedral Mg42RE8Zn50 (RE identical to Gd, Tb, Dy, Ho or Er) quasi-crystals have been investigated. These quasi-crystalline phases have a face-centred icosahedral lattice with a highly ordered Frank-Rasper-type structure as identified by electron diffraction and X-ray diffraction. The temperature dependence of DC magnetic susceptibility obeys a Curie-Weiss law in wide temperature ranges. The effective magnetic moments mu eff are close to those of free RE3+ ions and their paramagnetic Curie temperature Theta p is negative, indicating that the RE-RE exchange interactions are predominantly antiferromagnetic. The value of Theta p which is the sum of all exchange interactions is almost in proportion to the de Gennes factor. At low temperatures, spin-glass behaviour has been observed in the icosahedral Mg42Gd8Zn50 and Mg42Tb8Zn50 quasi-crystals and their spin freezing temperatures Tf are 5.5 K and 7.6 K, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0000443953&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000443953&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/7/11/009
DO - 10.1088/0953-8984/7/11/009
M3 - Article
AN - SCOPUS:0000443953
VL - 7
SP - 2313
EP - 2320
JO - [No source information available]
JF - [No source information available]
IS - 11
M1 - 009
ER -