Study of columnar amorphization and structural symmetry changes produced by swift heavy ion irradiation in YBa2Cu3O7-y thin films using STM

被引：30

作者：

Kumar, R

Samanta, SB

Arora, SK

Gupta, A

Kanjilal, D

Pinto, R

Narlikar, AV

机构：

[1] Ctr Nucl Sci, New Delhi 110067, India

[2] Natl Phys Lab, New Delhi 110012, India

[3] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 106卷 / 12期

关键词：

high-T-c superconductors; thin films; scanning tunneling microscopy; swift heavy ion irradiation effects;

D O I：

10.1016/S0038-1098(98)00122-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Columnar amorphization and structural symmetry changes produced by 250 MeV Ag+17 ion irradiation in epitaxial thin films of YBa2Cu3O7-y were studied using scanning tunneling microscopy (STM). The columnar amorphized regions were found to have sizes between 2-3 nm and structural distortion up to 4-5 nm size around the ion tracks. The change in spacing between the nearest columnar defect as a function of ion fluence was studied. The observed columnar amorphization is discussed in the framework of electronic energy loss of swift heavy ions which excites the electronic system of the materials leading to the deterioration of structural symmetry due to energy transfer to lattice via electron-phonon interactions. (C) 1998 Elsevier Science Ltd. All rights reserved.

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收藏

页码：805 / 810

页数：6

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