Macroscopic quantum tunneling of the magnetization in the single crystal of [(Mn0.96Cr0.04)12O12 (CH3COO)16(H2O)4]•2CH3COOH•4H2O -: art. no. 202509

被引：5

作者：

He, LH ^{[1
]}

Yan, QW ^{[1
]}

Wang, FW ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 20期

关键词：

D O I：

10.1063/1.1923752

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large-size single crystals of the single-molecule magnet [(Mn0.96Cr0.04)(12)O-12(CH3COO)(16)(H2O)(4)] center dot 2CH(3)COOH center dot 4H(2)O ((Mn0.96Cr0.04)12-Ac) were grown, and the effect of Cr substitution on quantum tunneling of the magnetization (QTM) was investigated. In comparison with its parent Mn12-Ac {abbreviated for [Mn12O12 (CH3COO)(16)(H2O)(4)] center dot 2CH(3)COOH center dot 4H(2)O}, a faster relaxation, i. e., a higher QTM probability, has been observed in (Mn0.96Cr0.04)12-Ac. This modulation of the relaxation time due to the Cr doping could be attributed to additional intrinsic, but distributed, transverse and longitudinal anisotropies raised by a subtle change of the local environment in the magnetic Mn12 core. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 12 条

[1] Single-molecule magnets:: Jahn-Teller isomerism and the origin of two magnetization relaxation processes in Mn12 complexes [J].

Aubin, SMJ ;

Sun, ZM ;

Eppley, HJ ;

Rumberger, EM ;

Guzei, IA ;

Folting, K ;

Gantzel, PK ;

Rheingold, AL ;

Christou, G ;

Hendrickson, DN .

INORGANIC CHEMISTRY, 2001, 40 (09) :2127-2146

[2] Spin tunneling via dislocations in Mn12 acetate crystals -: art. no. 187203 [J].

Chudnovsky, EM ;

Garanin, DA .

PHYSICAL REVIEW LETTERS, 2001, 87 (18) :187203-1

[3]

CHUDNOVSKY EM, 2001, NATURE, V410, P789

[4] Origin of second-order transverse magnetic anisotropy in Mn12-acetate -: art. no. 257201 [J].

Cornia, A ;

Sessoli, R ;

Sorace, L ;

Gatteschi, D ;

Barra, AL ;

Daiguebonne, C .

PHYSICAL REVIEW LETTERS, 2002, 89 (25)

[5] Distribution of internal transverse magnetic fields in a Mn12-based single molecule magnet -: art. no. 020411 [J].

del Barco, E ;

Kent, AD ;

Chakov, NE ;

Zakharov, LN ;

Rheingold, AL ;

Hendrickson, DN ;

Christou, G .

PHYSICAL REVIEW B, 2004, 69 (02)

[6] Macroscopic measurement of resonant magnetization tunneling in high-spin molecules [J].

Friedman, JR ;

Sarachik, MP ;

Tejada, J ;

Ziolo, R .

PHYSICAL REVIEW LETTERS, 1996, 76 (20) :3830-3833

[7] PREPARATION, STRUCTURE, AND MAGNETIC-PROPERTIES OF A DODECANUCLEAR MIXED-VALENCE MANGANESE CARBOXYLATE [J].

LIS, T .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1980, 36 (SEP) :2042-2046

[8] Low-energy magnetic excitations of the Mn12-acetate spin cluster observed by neutron scattering [J].

Mirebeau, I ;

Hennion, M ;

Casalta, H ;

Andres, H ;

Güdel, HU ;

Irodova, AV ;

Caneschi, A .

PHYSICAL REVIEW LETTERS, 1999, 83 (03) :628-631

[9] MAGNETIC-PROPERTIES OF A MN CLUSTER ORGANIC-COMPOUND [J].

NOVAK, MA ;

SESSOLI, R ;

CANESCHI, A ;

GATTESCHI, D .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 146 (1-2) :211-213

[10] Magnetic anisotropy, tunneling effects, high-frequency EPR, and molecular structure of fast-relaxation species of Mn12 -: art. no. 094424 [J].

Takeda, K ;

Awaga, K ;

Inabe, T ;

Yamaguchi, A ;

Ishimoto, H ;

Tomita, T ;

Mitamura, H ;

Goto, T ;

Môri, N ;

Nojiri, H .

PHYSICAL REVIEW B, 2002, 65 (09) :1-12

← 1 2 →