Macroscopic quantum tunneling in molecular magnets

被引:152
作者
Barbara, B
Thomas, L
Lionti, F
Chiorescu, I
Sulpice, A
机构
[1] CNRS, Lab Magnetisme Louis Neel, F-38042 Grenoble 09, France
[2] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 09, France
关键词
quantum tunneling; molecules; large spins; environment;
D O I
10.1016/S0304-8853(99)00409-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Our present understanding of the phenomenon of quantum tunneling of magnetization (QTM), is reviewed in the light of the experiments performed on the molecular complex Mn-12-ac. This system, in which QTM was clearly shown for the first time, consists of molecules with mesoscopic spins in dipolar interactions. Both single and many-molecule effects are essential for the observation of QTM (crystal field, hyperfine and dipolar interactions), which allows one to make a link between mesoscopic physics and magnetism. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:167 / 181
页数:15
相关论文
共 69 条
[1]   MACROSCOPIC QUANTUM TUNNELING IN MAGNETIC PROTEINS [J].
AWSCHALOM, DD ;
SMYTH, JF ;
GRINSTEIN, G ;
DIVINCENZO, DP ;
LOSS, D .
PHYSICAL REVIEW LETTERS, 1992, 68 (20) :3092-3095
[2]   Quantum resonance of the magnetisation in a single-crystal of Mn12-ac [J].
Barbara, B ;
Thomas, L ;
Lionti, F ;
Sulpice, A ;
Caneschi, A .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 177 :1324-1329
[3]   MESOSCOPIC QUANTUM TUNNELING OF THE MAGNETIZATION [J].
BARBARA, B ;
WERNSDORFER, W ;
SAMPAIO, LC ;
PARK, JG ;
PAULSEN, C ;
NOVAK, MA ;
FERRE, R ;
MAILLY, D ;
SESSOLI, R ;
CANESCHI, A ;
HASSELBACH, K ;
BENOIT, A ;
THOMAS, L .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 140 :1825-1828
[4]  
Barbara B, 1999, PHYS WORLD, V12, P35
[5]   MAGNETIC AFTEREFFECT ASSOCIATED WITH NARROW DOMAIN WALLS IN SOME RARE-EARTH BASED INTERMETALLIC COMPOUNDS [J].
BARBARA, B ;
FILLION, G ;
GIGNOUX, D ;
LEMAIRE, R .
SOLID STATE COMMUNICATIONS, 1972, 10 (12) :1149-&
[6]  
BARBARA B, 1977, J PHYS, V34, P1039
[7]  
BARBARA B, 1991, P INT WORKSH STUD MA, V235
[8]  
BARBARA B, 1978, P 2 INT S AN CONC, V137
[9]   High-frequency EPR spectra of a molecular nanomagnet: Understanding quantum tunneling of the magnetization [J].
Barra, AL ;
Gatteschi, D ;
Sessoli, R .
PHYSICAL REVIEW B, 1997, 56 (13) :8192-8198