High Upper Critical Field of Sm_{0.85}Nd_{0.15}FeAsO_{0.85}F_{0.15} Superconductors by Mechanical Alloying Synthesis

Ai-Hua FANG; Xiao-Ming XIE; Fu-Qiang HUANG; Mian-Heng JIANG

doi:10.3724/sp.j.1077.2012.11705

journal article·2012-06-13

High Upper Critical Field of Sm_0.85Nd_0.15FeAsO_0.85F_0.15 Superconductors by Mechanical Alloying Synthesis

Ai-Hua FANG, Xiao-Ming XIE, Fu-Qiang HUANG, Mian-Heng JIANG

Journal of Inorganic Materials· Volume 27· Issue 4

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Source abstract

Abstract

通过采用机械合金化方法制备的高活性的粉体, 可以高度可重复性地制备高质量的铁基超导材料Sm 0.85 Nd 0.15 FeAsO 0.85 F 0.15 . 样品具有高临界温度 T c (约51 K)和高临界场 H c2 (达到377 T). 由WHH公式确定的Hc2显著高于常规固相方法制备样品的典型值(<200 T). 高的临界磁场Hc2与样品微结构有很大关系. 机械合金化处理的原始粉体包含大量的晶格畸变缺陷, 在快速升温和低温退火制备的小晶粒陶瓷样品中这些缺陷会部分残留, 因此形成有效的磁通钉扎, 从而提高样品的临界场.

Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloys

OpenAlex topics: Iron-based superconductors research · Physics of Superconductivity and Magnetism · Corporate Taxation and Avoidance

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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