TY - JOUR
T1 - Random Co(II)-Ni(II) Ferromagnetic Chains Showing Coexistent Antiferromagnetism, Metamagnetism, and Single-Chain Magnetism
AU - Li, Xiu Bing
AU - Ma, Yu
AU - Gao, En Qing
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/6/18
Y1 - 2018/6/18
N2 - A series of isomorphous compounds of general formula [Co1-xNix(tzpo)(N3)(H2O)2]n·nH2O (x = 0, 0.19, 0.38, 0.53, 0.68, 0.84, and 1; tzpo = 4-(5-tetrazolate)pyridine-N-oxide) was prepared. The compounds consist of homometallic or heterometallic chains with simultaneous azide-tetrazolate bridges. The heterometallic systems feature random distribution of metal ions. All compounds across the series exhibit intrachain ferromagnetic coupling, interchain antiferromagnetic (AF) ordering, field-induced metamagnetic transition, and, except the Ni-only compound, single-chain magnetic dynamics. The AF ordering temperature, the metamagnetic critical field, and the relaxation parameters show different composition dependence. Notably, the blocking temperature for the Co-rich materials is higher than the Co-only compound, suggesting synergy between the randomly distributed Co(II) and Ni(II) ions in promoting slow relaxation. The results imply rich physics in the random mixed-metal systems and demonstrate the possibility of improving single-chain relaxation properties by blending metal ions.
AB - A series of isomorphous compounds of general formula [Co1-xNix(tzpo)(N3)(H2O)2]n·nH2O (x = 0, 0.19, 0.38, 0.53, 0.68, 0.84, and 1; tzpo = 4-(5-tetrazolate)pyridine-N-oxide) was prepared. The compounds consist of homometallic or heterometallic chains with simultaneous azide-tetrazolate bridges. The heterometallic systems feature random distribution of metal ions. All compounds across the series exhibit intrachain ferromagnetic coupling, interchain antiferromagnetic (AF) ordering, field-induced metamagnetic transition, and, except the Ni-only compound, single-chain magnetic dynamics. The AF ordering temperature, the metamagnetic critical field, and the relaxation parameters show different composition dependence. Notably, the blocking temperature for the Co-rich materials is higher than the Co-only compound, suggesting synergy between the randomly distributed Co(II) and Ni(II) ions in promoting slow relaxation. The results imply rich physics in the random mixed-metal systems and demonstrate the possibility of improving single-chain relaxation properties by blending metal ions.
UR - https://www.scopus.com/pages/publications/85048664167
U2 - 10.1021/acs.inorgchem.8b01053
DO - 10.1021/acs.inorgchem.8b01053
M3 - 文章
C2 - 29870229
AN - SCOPUS:85048664167
SN - 0020-1669
VL - 57
SP - 7446
EP - 7454
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 12
ER -