INSTANTANEOUS DIFFUSION IN SPIN-ECHO DYNAMICS - A FREQUENCY-DOMAIN EXPERIMENTAL INVESTIGATION

被引:15
作者
BOSCAINO, R [1 ]
GELARDI, FM [1 ]
机构
[1] UNIV PALERMO,IST FIS,I-90123 PALERMO,ITALY
来源
PHYSICAL REVIEW B | 1992年 / 46卷 / 22期
关键词
D O I
10.1103/PhysRevB.46.14550
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report an experimental investigation on the spectral content of the echo radiation emitted by an electron spin system excited by a two-pulse sequence. The measurements are carried out at liquid-helium temperature in a sample of quartz containing a very low concentration of [AlO4]0 centers, in which instantaneous diffusion mechanism makes the main contribution to the phase relaxation. The experimental spectral shapes reproduce the theoretical ones, as calculated for an ideal system of noninteracting spins. However, the agreement is only qualitative, as the experimental spectral widths are found to be less than expected by a factor that depends on the exciting sequence and amounts up to 50%. On the basis of the observed features, this spectral narrowing effect is tentatively interpreted as a consequence of the phase relaxation induced by the instantaneous diffusion.
引用
收藏
页码:14550 / 14558
页数:9
相关论文
共 32 条
  • [1] ABRAGAM A, 1961, PRINCIPLES NUCLEAR M
  • [2] ALLEN L, 1985, OPTICAL RESONANCE 2
  • [3] Atsarkin V. A., 1991, Magnetic Resonance Review, V16, P1
  • [4] OSCILLATORY BEHAVIOR OF 2-PHOTON ECHO SIGNALS
    BOSCAINO, R
    GELARDI, FM
    MESSINA, G
    [J]. PHYSICS LETTERS A, 1983, 97 (09) : 413 - 416
  • [5] ANOMALOUS RATE OF FREE-INDUCTION DECAY
    BOSCAINO, R
    LABELLA, VM
    [J]. PHYSICAL REVIEW A, 1990, 41 (09): : 5171 - 5178
  • [6] FREE-INDUCTION DECAY AFTER SATURATION IN DILUTE RUBY
    BOSCAINO, R
    GELARDI, FM
    [J]. PHYSICAL REVIEW A, 1992, 45 (01): : 546 - 549
  • [7] DOUBLE-QUANTUM NUTATIONS IN A 2-LEVEL SPIN SYSTEM
    BOSCAINO, R
    GELARDI, FM
    MESSINA, G
    [J]. PHYSICAL REVIEW B, 1986, 33 (05): : 3076 - 3082
  • [8] BOSCAINO R, 1978, PHYSICA C, V138, P179
  • [9] SPIN-ECHO DECAY IN A GLASSY SYSTEM AT LOW-TEMPERATURE
    DELSORDO, S
    GELARDI, FM
    [J]. PHYSICS LETTERS A, 1989, 138 (09) : 526 - 530
  • [10] Dudkin V. I., 1986, Soviet Physics - Solid State, V28, P729