Adiabatic Landau-Zener-Stuckelberg transition with or without dissipation in the low-spin molecular system V15 -: art. no. 020402

被引：81
作者：
Chiorescu, I
Wernsdorfer, W
Müller, A
Miyashita, S
Barbara, B
机构：
[1] CNRS, Lab Louis Neel, F-38042 Grenoble, France
[2] Univ Bielefeld, Fak Chem, D-33501 Bielefeld, Germany
[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW B | 2003年 / 67卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.67.020402
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The spin-1/2 molecular system V-15 shows no barrier against spin reversal. This makes possible direct phonon activation between the two levels. By tuning the field sweeping rate and the thermal coupling between the sample and the thermal reservoir we have control over the phonon-bottleneck phenomena previously reported in this system. We demonstrate adiabatic motion of molecule spins in time dependent magnetic fields and with different thermal coupling to the cryostat bath. We also discuss the origin of the zero-field tunneling splitting for a half-integer spin.
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相关论文
共 40 条
[1]  
Abragam A., 1970, ELECT PARAMAGNETIC R
[2]  
AJIRO Y, COMMUNICATION
[3]   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
[4]  
Barbara B, 2002, PROG THEOR PHYS SUPP, P357, DOI 10.1143/PTPS.145.357
[5]   Phonon-assisted tunneling in high-spin molecules: Experimental evidence [J].
Bellessa, G ;
Vernier, N ;
Barbara, B ;
Gatteschi, D .
PHYSICAL REVIEW LETTERS, 1999, 83 (02) :416-419
[6]  
Carter G. C., 1977, PROGR MAT SCI, V20
[7]   Low-energy spin excitations in the molecular magnetic cluster V15 [J].
Chaboussant, G ;
Basler, R ;
Sieber, A ;
Ochsenbein, ST ;
Desmedt, A ;
Lechner, RE ;
Telling, MTF ;
Kögerler, P ;
Müller, A ;
Güdel, HU .
EUROPHYSICS LETTERS, 2002, 59 (02) :291-297
[8]   Butterfly hysteresis loop and dissipative spilt reversal in the S = 1/2, V15 molecular complex [J].
Chiorescu, I ;
Wernsdorfer, W ;
Müller, A ;
Bögge, H ;
Barbara, B .
PHYSICAL REVIEW LETTERS, 2000, 84 (15) :3454-3457
[9]   Phonon-assisted tunneling in the quantum regime of Mn12 acetate [J].
Chiorescu, I ;
Giraud, R ;
Jansen, AGM ;
Caneschi, A ;
Barbara, B .
PHYSICAL REVIEW LETTERS, 2000, 85 (22) :4807-4810
[10]   Non-adiabatic Landau-Zener transitions in low-spin molecular magnet V15 [J].
Chiorescu, I ;
Wernsdorfer, W ;
Müller, A ;
Bögge, H ;
Barbara, B .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2000, 221 (1-2) :103-109
1234