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PtxCo1-x(x=0.48~0.51)合金的磁性能和晶體結(jié)構(gòu)
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃(2007AA03Z438)


Magnetic Properties and Crystal Structure of PtxCo1-x(x=0.48~0.51) Alloys
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    摘要:

    系統(tǒng)研究了等原子比附近不同Pt、Co原子比的PtCo合金的磁性能和晶體結(jié)構(gòu)。采用電弧爐熔煉方式制備了原子比為PtxCo1-x(x=0.48~0.51)的合金，熱處理后磁測(cè)量結(jié)果顯示，隨著Pt含量的增加，合金的剩磁逐漸減小，矯頑力逐漸增大。合金的X射線衍射結(jié)果表明：時(shí)效熱處理后，隨著Pt含量的增加，合金面心四方結(jié)構(gòu)的有序相的c/a值逐漸減小，c/a值的減小增大了四方晶格結(jié)構(gòu)的a與c方向的不對(duì)稱性，使有序相的磁晶各向異性場(chǎng)增大，提高了合金的矯頑力

    Abstract:

    In this paper, the magnetic properties and crystal structure of the PtCo alloys around the equiatomic composition have been studied. The PtxCo1-x (x=0.48,0.49,0.50,0.51) bulk samples are prepared by arc melting and heat treatment. The magnetic measurement results indicate that the increase of platinum content causes the decrease of remanence and the increase of coercivity. The XRD result indicates that the axial ratio c/a of the tetragonal structure decreases with increasing the content of platinum, which leads to an increase of the deviation from unity of the tetragonal structure. So that, the anisotropy field of the ordered phase is improved and the coercivity is increased.

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劉 濤,李 衛(wèi). PtxCo1-x(x=0.48~0.51)合金的磁性能和晶體結(jié)構(gòu)[J].稀有金屬材料與工程,2009,38(11):1965~1968.[Liu Tao, Li Wei. Magnetic Properties and Crystal Structure of PtxCo1-x(x=0.48~0.51) Alloys[J]. Rare Metal Materials and Engineering,2009,38(11):1965~1968.]
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  • 收稿日期:2008-12-01
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