Ferromagnetic Behavior of Ultrathin Manganese Nanosheets

被引：8
作者：
Mitra, Sreemanta [1 ,2 ]
Mandal, Amrita [1 ,2 ]
Datta, Anindya [3 ]
Banerjee, Sourish [2 ]
Chakravorty, Dipankar [1 ]
机构：
[1] Indian Assoc Cultivat Sci, MLS Profs Unit, Kolkata 700032, India
[2] Guru Gobind Singh Indraprastha Univ, USBAS, New Delhi 110075, India
[3] Univ Calcutta, Dept Phys, Kolkata 700009, W Bengal, India
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 30期
关键词：
MN CLUSTERS; THIN-FILMS; SEMICONDUCTORS; MAGNETISM; TEMPERATURE; TRANSITION; BULK;
D O I：
10.1021/jp204765e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ferromagnetic behavior has been observed experimentally for the first time in nanostructured manganese. Ultrathin (similar to-0.6-nm) manganese nanosheets were synthesized inside the two-dimensional channels of sol gel-derived Na-4 mica. The magnetic properties of the confined system were measured within the 2-300 K temperature range. The confined structure was found to show a ferromagnetic behavior with a nonzero coercivity value. The coercivity value remained nonzero throughout the entire temperature range of measurement. The experimental variation of the susceptibility as a function of temperature can be satisfactorily explained on the basis of a two-dimensional system with a Heisenberg Hamiltonian involving direct exchange interaction.
引用
收藏
页码：14673 / 14677
页数：5
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