TY - JOUR
T1 - Frustrated magnetism of pharmacosiderite comprising tetrahedral clusters arranged in the primitive cubic lattice
AU - Okuma, Ryutaro
AU - Yajima, Takeshi
AU - Fujii, Tatsuo
AU - Takano, Mikio
AU - Hiroi, Zenji
N1 - Funding Information:
Acknowledgments We are grateful to Tsuyoshi Okubo and Nic Shannon for the helpful discussions. RO is supported by the Materials Education Program for the Future Leaders in Research, Industry, and Technology (MERIT), Ministry of Education, Culture, Sports, Science and Technology of Japan. This study was partly supported by the Core-to-Core Program for Advanced Research Networks, Japan Society for the Promotion of Science (JSPS).
Funding Information:
We are grateful to Tsuyoshi Okubo and Nic Shannon for the helpful discussions. RO is supported by the Materials Education Program for the Future Leaders in Research, Industry, and Technology (MERIT), Ministry of Education, Culture, Sports, Science and Technology of Japan. This study was partly supported by the Core-to-Core Program for Advanced Research Networks, Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
©2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - We show that pharmacosiderite is a novel cluster antiferromagnet comprising frustrated regular tetrahedra consisting of spin-5=2 Fe3+ ions arranged in the primitive cubic lattice. The connectivity of the tetrahedra and inter-cluster interaction of 2.9 K, which is significantly large compared with the intra-cluster interaction of 10.6 K, provide a unique platform for frustration physics. An unconventional antiferromagnetic order is observed below TN ~ 6 K, accompanied by a weak ferromagnetic moment and large fluctuation, as demonstrated by Mössbauer spectroscopy. A q = 0 magnetic order with a total S = 0 for the tetrahedral cluster is proposed based on an irreducible representation analysis, which may explain the origin of the weak ferromagnetism and fluctuation.
AB - We show that pharmacosiderite is a novel cluster antiferromagnet comprising frustrated regular tetrahedra consisting of spin-5=2 Fe3+ ions arranged in the primitive cubic lattice. The connectivity of the tetrahedra and inter-cluster interaction of 2.9 K, which is significantly large compared with the intra-cluster interaction of 10.6 K, provide a unique platform for frustration physics. An unconventional antiferromagnetic order is observed below TN ~ 6 K, accompanied by a weak ferromagnetic moment and large fluctuation, as demonstrated by Mössbauer spectroscopy. A q = 0 magnetic order with a total S = 0 for the tetrahedral cluster is proposed based on an irreducible representation analysis, which may explain the origin of the weak ferromagnetism and fluctuation.
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U2 - 10.7566/JPSJ.87.093702
DO - 10.7566/JPSJ.87.093702
M3 - Article
AN - SCOPUS:85052398457
SN - 0031-9015
VL - 87
SP - 937021
EP - 937024
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 9
ER -