Magnetic and calorimetric study of a single grain of quasicrystalline Al-Pd-Mn.
Magnetic and calorimetric study of a single grain of quasicrystalline Al-Pd-Mn.
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准晶 Al-Pd-Mn 单晶粒的磁性和量热研究。
DOI：
10.1103/physrevb.52.886
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
de Boissieu M
中科院分区：
文献类型：
--
作者：
Lasjaunias;Sulpice;Keller;Préjean;de Boissieu M
我们提出了一个单一的Al 68.7 Pd 21.7 Mn 9.6准晶颗粒上获得的磁性和量热的结果。我们表明，一些锰确实具有磁性，并且具有很大的自旋。这些自旋通过Ruderman-Kittel-Kasuya-Yosida（RKKY）相互作用耦合，在1.1 K下产生自旋玻璃化转变。令人惊讶的是，RKKY电位被发现等于亚稳Al-Mn准晶和结晶Cu-Mn。与快淬亚稳Al-Mn准晶的情况相比，其线性比热T项很小，约为Al的1/4。最后，我们得出了含锰准晶磁性的一般特征和内在起源。
We present the magnetic and calorimetric results obtained on a single Al 68.7 Pd 21.7 Mn 9.6 quasicrystal grain. We show that a few Mn’s are really magnetic and carry a large spin. These spins are coupled by Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions yielding a spin-glass transition at 1.1 K. Surprisingly, the RKKY potential is found to equal that of metastable Al-Mn quasicrystals and that of crystalline Cu-Mn. In contrast with the case of melt-spun metastable Al-Mn quasicrystals, the linear T term of the specific heat is very small: about 1/4 of that of Al. Finally, we conclude to the general character and to the intrinsic origin of the magnetism of quasicrystals containing Mn.