Quantum size effect on the heat capacity of nickel nanolattice

被引：7
|
作者：
Singh, J. [1 ]
Tarachand [2 ]
Samatham, S. S. [2 ,4 ]
Venkateshwarlu, D. [2 ,5 ]
Kaurav, Netram [3 ]
Ganesan, V. [2 ]
Okram, G. S. [2 ]
机构：
[1] IPS Acad, ISLE, Dept Phys, Indore 452012, Madhya Pradesh, India
[2] UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India
[3] Govt Holkar Sci Coll, Dept Phys, AB Rd, Indore 452001, Madhya Pradesh, India
[4] Indian Inst Technol, Dept Phys, Magnet Mat Lab, Bombay 400076, Maharashtra, India
[5] Indira Gandhi Ctr Atom Res, Kalpakkam, Tamil Nadu, India
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 20期
关键词：
THERMODYNAMIC PROPERTIES; VANADIUM PARTICLES; NANOPARTICLES; CLUSTER;
D O I：
10.1063/1.4985583
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nearly exponentially decaying heat capacity was observed exceptionally in a well-characterized naturally assembled hexagonal closed packed lattice of 4.0 nm nickel nanoparticles (NPs). It was also associated with quantum jumps. These were however not observed in other NP sizes and have negligible effects of high magnetic fields. Magnetic susceptibilities in contrast revealed the evolution of quantum size effects with a decrease in particle size. They exhibited sharp rise below about 30 K and vestiges of saturations below 5 K. The sharp rise was explained by Curie-like characteristics of odd electrons, while the saturations tend towards the orthogonal even-like case. Published by AIP Publishing.
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页数：4
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