2013 Fiscal Year Final Research Report

How magnetism will change when the dimension of sample changes

Research Project

Project/Area Number	23540432
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Mathematical physics/Fundamental condensed matter physics
Research Institution	Ehime University
Principal Investigator	NAITO Toshio 愛媛大学, 理工学研究科, 教授 (20227713)
Co-Investigator(Renkei-kenkyūsha)	MAYAMA Hiroyuki 北海道大学, 電子科学研究所, 助教 (70360948)
Project Period (FY)	2011 – 2013
Keywords	物性基礎論 / フラクタル
Research Abstract	The purpose of this research project is to clarify the relationship between fractal dimension (D) and ordering in cooperative phenomena such as magnetic and superconducting transitions by presenting experimental data. The novelty of this research lies in the realization of control of D of given samples and elucidation of their electronic properties. For three years the study has achieved most of the purposes. The followings have been clarified by measurements of the physical properties of samples with various farctal dimensions; the relationship between Neel temperature of CoO and its fractal dimension, and that between critical current density of high-T_C copper oxide superconductors and its fractal dimension. These results are published in scientific journals after patent was applied.

(4 results)