AUTHOR=Zhao Wenjun , Sun Ying , Liu Yufei , Shi Kewen , Lu Huiqing , Song Ping , Wang Lei , Han Huimin , Yuan Xiuliang , Wang Cong TITLE=Negative Thermal Expansion over a Wide Temperature Range in Fe-Doped MnNiGe Composites JOURNAL=Frontiers in Chemistry VOLUME=6 YEAR=2018 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00015 DOI=10.3389/fchem.2018.00015 ISSN=2296-2646 ABSTRACT=
Fe-doped MnNiGe alloys were successfully synthesized by solid-state reaction. Giant negative thermal expansion (NTE) behaviors with the coefficients of thermal expansion (CTE) of −285.23 × 10−6 K−1 (192–305 K) and −1167.09 × 10−6 K−1 (246–305 K) have been obtained in Mn0.90Fe0.10NiGe and MnNi0.90Fe0.10Ge, respectively. Furthermore, these materials were combined with Cu in order to control the NTE properties. The results indicate that the absolute value of CTE gradually decreases with increasing Cu contents. In Mn0.92Fe0.08NiGe/