@article{oai:repo.qst.go.jp:00049159,
 author = {Nishikubo, Takumi and Sakai, Yuki and Oka, Kengo and Mizumaki, Masaichiro and Watanuki, Tetsu and Machida, Akihiko and Maejima, Naoyuki and Ueda, Shigenori and Mizokawa, Takashi and Azuma, Masaki and 綿貫 徹 and 町田 晃彦 and 前島 尚行},
 issue = {6},
 journal = {Applied Physics Express},
 month = {Aug},
 note = {Negative thermal expansion induced by intermetallic charge transfer between Bi^(5+) and Ni^(2+) was observed in perovskite-type Bi_(1−x)Sb_(x)NiO_(3) (x = 0.05 and 0.10). Bi^(3+) and Bi^(5+) had a long-range ordering in the low-temperature phase of Bi_(0.95)Sb_(0.05)NiO_(3) while the ordering was short-range in Bi_(0.9)Sb_(0.1)NiO_(3). The latter compound exhibited a continuous negative thermal expansion with a linear coefficient of thermal expansion of αL = −106 ppm K^(−1) without temperature hysteresis in a wide temperature range of 200–320 K.},
 title = {Optimized negative thermal expansion induced by gradual intermetallic charge transfer in Bi1-xSbxNiO3},
 volume = {11},
 year = {2018}
}