Magnetic relaxation properties of helium-3 adsorbed on hexagonal boron nitride

被引：17

作者：

Crane, TP ^{[1
]}

Cowan, BP ^{[1
]}

机构：

[1] Univ London Royal Holloway & Bedford New Coll, Millikelvin Lab, Egham TW20 0EX, Surrey, England

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.62.11359

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present pulse NMR measurements on He-3 adsorbed on hexagonal boron nitride powder in the registered phase. We observe strong coupled magnetic relaxation with substrate B-11 spins, mediated by N-14 surface-layer spins via the level-crossing or quadrupole-dip (QD) effect at 4.5 MHz. rib initio electronic structure calculations of the BN surface-layer electric field gradients, dramatically modified by the He-3 were essential in justifying our QD explanation. BN crystallite geometry plays a key role in producing the QD. Stretched exponential fits to the QD relaxation data may provide a new tool for studying specifically the commensurate phases on BN and related materials.

引用

页码：11359 / 11362

页数：4

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