Asymmetrical nucleation of the A-B transition in superfluid 3He

被引：1

作者：

Bartkowiak, M

Fisher, SN

Guénault, AM

Haley, RP ^{[1
]}

Plenderleith, GN

Pickett, GR

Skyba, P

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

来源：

PHYSICA B | 2000年 / 284卷

关键词：

He-3; superfluid; nucleation; ultralow temperatures;

D O I：

10.1016/S0921-4526(99)02485-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using a magnetic field we can induce nucleation in superfluid He-3 both ways across the A-B phase boundary, at temperatures below 0.2T(c). The nucleation takes place in a quasiparticle black-body radiator in a variable magnetic field profile and is detected from the associated temperature jump. Before A-phase will nucleate, the parent B-phase must be overmagnetised by a history-dependent amount. Similarly, B-phase nucleation requires a degree of undermagnetisation. However, the transition is asymmetric and the history dependences are quite different. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：242 / 243

页数：2