TY - JOUR
T1 - Negative magnetoresistance in organic ionic semi conductor
T2 - TTFCOONH 3Ph
AU - Kobayashi, Yuka
AU - Sumi, Satoshi
AU - Terauchi, Takeshi
AU - Iwai, Hideo
N1 - Funding Information:
We acknowledge Prof. S. Maekawa (JAEA) and Prof. M. Mori (JAEA) for essential discussions on magnetic properties. We are also grateful for Dr. T. Fujii (The Univ. of Tokyo), Prof. T. Nakamura (IMS), and Dr. H. Kino (NIMS) for fruitful discussions on transport measurements, ESR measurements and theoretical aspects, respectively. We acknowledge Prof. I. Terasaki (Nagoya Univ.) and Prof. H. Fukuyama (Tokyo Science Univ.) for fruitful discussions in the early stage of this study. We thank Ms. M. Takahashi for an assistance of physical measurements. ESR measurements were carried out using facilities provided by Center of Materials Research for Low Carbon Emission in NIMS of “Low-Carbon Research Network”. This study was partially supported by ‘ NEXT ’ Program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, and Nano-Integration Foundry in NIMS .
PY - 2013
Y1 - 2013
N2 - TFFCOONI-I3Ph is a recently synthesized open-shell ionic semiconductor, the electronic state of which differs from that of typical organic closed-shell semiconductors. Magnetotransport properties were examined using a single-crystal sample, and found to exhibit small negative magnetoresistance (-02%) for 9 T at room temperaturet). The magnetization curve verifies the existence of a ferromagnetic (35%) and a paramagnetic (65%) component at it, which is very similar to that of diluted magnetic semiconductors, despite the absence of any ferromagnetic metal elements. Electron spin resonance reveals weak localization of paramagnetic molecular spins, and moreover, ferromagnetic resonance confirms the existence of magnetically ordered spins in addition to the paramagnetic ones. The origin of the spin-polarized transport is discussed.
AB - TFFCOONI-I3Ph is a recently synthesized open-shell ionic semiconductor, the electronic state of which differs from that of typical organic closed-shell semiconductors. Magnetotransport properties were examined using a single-crystal sample, and found to exhibit small negative magnetoresistance (-02%) for 9 T at room temperaturet). The magnetization curve verifies the existence of a ferromagnetic (35%) and a paramagnetic (65%) component at it, which is very similar to that of diluted magnetic semiconductors, despite the absence of any ferromagnetic metal elements. Electron spin resonance reveals weak localization of paramagnetic molecular spins, and moreover, ferromagnetic resonance confirms the existence of magnetically ordered spins in addition to the paramagnetic ones. The origin of the spin-polarized transport is discussed.
KW - A. Organic ionic semiconductor
KW - D. Ferromagnetism
KW - D. Magnetotransport
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U2 - 10.1016/j.ssc.2013.04.014
DO - 10.1016/j.ssc.2013.04.014
M3 - Article
AN - SCOPUS:84885129868
VL - 165
SP - 27
EP - 32
JO - Solid State Communications
JF - Solid State Communications
SN - 0038-1098
ER -