Thermal expansion and magnetostriction of clathrate compound Pr3Pd20Ge6

Thermal expansion and magnetostriction of clathrate compound Pr3Pd20Ge6
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笼形化合物Pr3Pd20Ge6的热膨胀和磁致伸缩

DOI:
10.1088/1742-6596/969/1/012120
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发表时间:
2018
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
Kitazawa H
Kitazawa H
中科院分区:
--
文献类型:
--
作者:
Matsumoto K;Sekiguchi Y;Iwakami O;Ono T;Abe S;Ano G;Akatsu M;Mitsumoto K;Nemoto Y;Goto T;Takeda N;Kitazawa H

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在pr3pd 20ge6中,Pr离子位于两个不同的晶体位置,4a和8c位点。8c位点的反铁磁四极有序(AFQ)发生在250 mK。交流磁化率测量表明,4a位点的反铁磁有序(AFM)和8c位点的超精细增强Pr核磁有序(AFM)分别发生在77和9 mK。为了明确pr3pd20ge6的磁性和四极子性质,利用电容式膨胀计沿[001]方向对单晶样品进行了从8t到500 μK的热膨胀和磁致伸缩测量。在零场中,[001]方向的相对长度变化ΔL/L在AFQ处呈下降趋势,在AFM有序处呈急剧下降趋势。通过热膨胀和等温磁致伸缩测量,得到了pr3pd20ge6沿[001]方向的磁相图。
In Pr 3 Pd 20 Ge 6, the Pr ions are located at two different crystallographic sites, 4a and 8c site. Antiferro-quadrupole ordering (AFQ) of the 8c site occurs at 250 mK. Ac susceptibility measurement indicated that antiferromagnetic ordering (AFM) of the 4a site and Hyperfine-enhanced Pr nuclear magnetic ordering of the 8c site occur at 77 and 9 mK, respectively. To clarify the magnetic and quadrupole properties of Pr 3 Pd 20 Ge 6, thermal expansion and magnetostriction measurements on single crystal sample were carried out along the [001] direction up to 8 T down to 500 μK using a capacitive dilatometer. In zero field, relative length change ΔL/L in [001] direction had a dip at AFQ and abrupt decrease at AFM ordering. From thermal expansion and isothermal magnetostriction measurements, magnetic phase diagram of Pr 3 Pd 20 Ge 6 along [001] direction was obtained.
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