OBSERVATION OF PROPOSED FLUX PINNING SITES IN NEUTRON-IRRADIATED YBA2CU3O7-X

被引：18

作者：

LEE, JW ^{[1
]}

LESSURE, HS ^{[1
]}

LAUGHLIN, DE ^{[1
]}

MCHENRY, ME ^{[1
]}

SANKAR, SG ^{[1
]}

WILLIS, JO ^{[1
]}

COST, JR ^{[1
]}

MALEY, MP ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545

来源：

APPLIED PHYSICS LETTERS | 1990年 / 57卷 / 20期

关键词：

D O I：

10.1063/1.104159

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Microstructure and magnetic hysteresis have been compared for two samples of the YBa2Cu3O7-δ (δ∼0) high-temperature superconductor, one unirradiated, and one irradiated with fast neutrons (E≳0.1 MeV) to a fluence of 3×1018 n/cm 2. Notable changes in the microstructure include strain-induced contrast from regions 2-7 nm in size. An intrinsic critical current density (Jc) of 4.6×106 A/cm2 in zero field at 4 K has been determined from magnetic hysteresis measurements for the irradiated sample while 1.2×106 A/cm2 is noted for the unirradiated sample. We propose that the observed defect structure in the irradiated material is responsible for increased pinning and consequently higher Jc's.

引用

页码：2150 / 2152

页数：3

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