Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins

Atsushi Okazawa; Hiroyuki Nojiri; Takayuki Ishida; Norimichi Kojima

doi:10.1016/j.poly.2011.03.020

Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins

Atsushi Okazawa, Hiroyuki Nojiri, Takayuki Ishida, Norimichi Kojima

IMR - Institute for Materials Research (institute affiliation only)

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

15 Citations (Scopus)

Abstract

We synthesized and characterized a new compound [{Dy(hfac) ₃}₂Pd(dpk)₂] ([Dy₂Pd]; Hdpk = di-2-pyridyl ketoxime), which is isostructural with the known [Dy₂Cu] and [Dy₂Ni]. The study of the [Dy₂Pd] compound containing diamagnetic Pd ion is indispensable to clarify a contribution of the exchange coupling for a 4f-3d single-molecule magnet behavior. From the ac susceptibility measurements on [Dy₂Pd], we obtained Δ/k_B = 28.6(11) K and T_B = 1.1 K. In accordance with the blocking behavior, the pulsed-field magnetization showed the hysteresis behavior below 1.1 K. These parameters on [Dy₂Pd] having S_Pd = 0 was compared with those of the derivatives having S_Cu = 1/2 (Δ/k_B = 47 K and T_B = 1.8 K) and S_Ni = 1 (Δ/k_B = 62(4) K and T_B = 2.5 K). The T_B and Δ steadily increase with the increasing 3d(4d) spin quantum number.

Original language	English
Pages (from-to)	3140-3144
Number of pages	5
Journal	Polyhedron
Volume	30
Issue number	18
DOIs	https://doi.org/10.1016/j.poly.2011.03.020
Publication status	Published - 2011 Nov 28

Keywords

Exchange interaction
Lanthanoid
Rare earth metal
Single-molecule magnet

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title = "Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins",

abstract = "We synthesized and characterized a new compound [{Dy(hfac) 3}2Pd(dpk)2] ([Dy2Pd]; Hdpk = di-2-pyridyl ketoxime), which is isostructural with the known [Dy2Cu] and [Dy2Ni]. The study of the [Dy2Pd] compound containing diamagnetic Pd ion is indispensable to clarify a contribution of the exchange coupling for a 4f-3d single-molecule magnet behavior. From the ac susceptibility measurements on [Dy2Pd], we obtained Δ/kB = 28.6(11) K and TB = 1.1 K. In accordance with the blocking behavior, the pulsed-field magnetization showed the hysteresis behavior below 1.1 K. These parameters on [Dy2Pd] having SPd = 0 was compared with those of the derivatives having SCu = 1/2 (Δ/kB = 47 K and TB = 1.8 K) and SNi = 1 (Δ/kB = 62(4) K and TB = 2.5 K). The TB and Δ steadily increase with the increasing 3d(4d) spin quantum number.",

keywords = "Exchange interaction, Lanthanoid, Rare earth metal, Single-molecule magnet",

author = "Atsushi Okazawa and Hiroyuki Nojiri and Takayuki Ishida and Norimichi Kojima",

note = "Funding Information: This work was partly supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan (Nos. 21110513 , 22350057 and 22350059 ) and the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University . A part of this work was performed at CINTS, Tohoku University. HN has been supported by GCOE program: Materials Integration, Tohoku University, Japan. ",

year = "2011",

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day = "28",

doi = "10.1016/j.poly.2011.03.020",

language = "English",

volume = "30",

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T1 - Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins

AU - Okazawa, Atsushi

AU - Nojiri, Hiroyuki

AU - Ishida, Takayuki

AU - Kojima, Norimichi

N1 - Funding Information: This work was partly supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan (Nos. 21110513 , 22350057 and 22350059 ) and the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University . A part of this work was performed at CINTS, Tohoku University. HN has been supported by GCOE program: Materials Integration, Tohoku University, Japan.

PY - 2011/11/28

Y1 - 2011/11/28

N2 - We synthesized and characterized a new compound [{Dy(hfac) 3}2Pd(dpk)2] ([Dy2Pd]; Hdpk = di-2-pyridyl ketoxime), which is isostructural with the known [Dy2Cu] and [Dy2Ni]. The study of the [Dy2Pd] compound containing diamagnetic Pd ion is indispensable to clarify a contribution of the exchange coupling for a 4f-3d single-molecule magnet behavior. From the ac susceptibility measurements on [Dy2Pd], we obtained Δ/kB = 28.6(11) K and TB = 1.1 K. In accordance with the blocking behavior, the pulsed-field magnetization showed the hysteresis behavior below 1.1 K. These parameters on [Dy2Pd] having SPd = 0 was compared with those of the derivatives having SCu = 1/2 (Δ/kB = 47 K and TB = 1.8 K) and SNi = 1 (Δ/kB = 62(4) K and TB = 2.5 K). The TB and Δ steadily increase with the increasing 3d(4d) spin quantum number.

AB - We synthesized and characterized a new compound [{Dy(hfac) 3}2Pd(dpk)2] ([Dy2Pd]; Hdpk = di-2-pyridyl ketoxime), which is isostructural with the known [Dy2Cu] and [Dy2Ni]. The study of the [Dy2Pd] compound containing diamagnetic Pd ion is indispensable to clarify a contribution of the exchange coupling for a 4f-3d single-molecule magnet behavior. From the ac susceptibility measurements on [Dy2Pd], we obtained Δ/kB = 28.6(11) K and TB = 1.1 K. In accordance with the blocking behavior, the pulsed-field magnetization showed the hysteresis behavior below 1.1 K. These parameters on [Dy2Pd] having SPd = 0 was compared with those of the derivatives having SCu = 1/2 (Δ/kB = 47 K and TB = 1.8 K) and SNi = 1 (Δ/kB = 62(4) K and TB = 2.5 K). The TB and Δ steadily increase with the increasing 3d(4d) spin quantum number.

KW - Exchange interaction

KW - Lanthanoid

KW - Rare earth metal

KW - Single-molecule magnet

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VL - 30

SP - 3140

EP - 3144

JO - Polyhedron

JF - Polyhedron

IS - 18

ER -

Single-molecule magnet behavior enhanced by magnetic coupling between 4f and 3d spins

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Keywords

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