Threshold Effects of the Magnetic Influence on the Microhardness of KDP Crystals

被引：8

作者：

Darinskaya, E. V. ^{[1
]}

Koldaeva, M. V. ^{[1
]}

Alshits, V. I. ^{[1
]}

Voloshin, A. E. ^{[1
]}

Pritula, I. M. ^{[2
]}

机构：

[1] Russian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Moscow 119333, Russia

[2] Natl Acad Sci Ukraine, Inst Single Crystals, UA-61001 Kharkov, Ukraine

来源：

JETP LETTERS | 2019年 / 110卷 / 04期

关键词：

RELAXATION; KINETICS;

D O I：

10.1134/S0021364019160045

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The threshold of the magnetic effect on the microhardness of potassium dihydrogen phosphate (KDP) crystals has been found. It was previously shown that the preliminary exposure of such crystals to a magnetic field B for time t(m) changes their microhardness reversibly. This effect is well described by the quantity B(2)t(m); therefore, a decrease in the field B can be compensated by increasing the exposure time. In this work, it has been shown that such a compensation is possible only for fields above the threshold B-th approximate to 0.45 T, below which the effect is absent even at large exposure times. Both change in the microhardness and the lifetime of the meta-stable state of the crystal are suppressed near the threshold. At B > B-th, the effect occurs only when the exposure time t(m) exceeds a certain minimum time tmmin depending on B. A physical interpretation of the observed effects has been proposed.

引用

页码：279 / 283

页数：5

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