Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters oleh Ryutaro Okuma, Maiko Kofu, Shinichiro Asai, Maxim Avdeev, Akihiro Koda, Hirotaka Okabe, Masatoshi Hiraishi, Soshi Takeshita, Kenji M. Kojima, Ryosuke Kadono, Takatsugu Masuda, Kenji Nakajima, Zenji Hiroi