Effects of Pressure on Magnetic Properties of Ferrihydrite Antiferromagnetic Nanoparticles

被引：2
作者：
Komorida, Y. [1 ]
Silva, N. J. O. [2 ]
Mito, M. [1 ]
Deguchi, H. [1 ]
Takagi, S. [1 ]
Palacio, F. [2 ]
Amaral, V. S. [3 ,4 ]
机构：
[1] Kyushu Inst Technol, Fac Engn, Kitakyushu, Fukuoka 8048550, Japan
[2] Univ Zaragoza, Inst Ciencia Mat Aragon, CSIC, E-50009 Zaragoza, Spain
[3] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal
[4] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal
来源：
25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM | 2009年 / 150卷
关键词：
D O I：
10.1088/1742-6596/150/4/042098
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effects of pressure on iron oxide hydroxide ferrihydrite (FeOOH center dot nH(2)O) nanoparticles with particle size of 4.7 +/- 0.2 nm were investigated through DC magnetic measurements in the pressure region up to P = 13.5 kbar. The magnetization curve up to 50 kOe exhibits the coexistence of saturation and linear contributions. The value of high field susceptibility, the latter contribution, increases with increasing pressure for P <= 10.0 kbar. In contrast, the former contribution, associated to the uncompensated moment, decreases for P <= 10.0 kbar. At further pressure, there is no distinct pressure response. These effects of pressure are probably related to changes in the anisotropy energy due to the volume shrinkage.
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页数：4
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