Observation of the influence of dipolar and spin frustration effects on the magnetocaloric properties of a trigonal prismatic {Gd7 } molecular nanomagnet

Chemical Science
Eufemio Moreno PinedaEric J L McInnes

Abstract

We report the synthesis and structure of a molecular {Gd7} cage of the formula (iPr2NH2)6[Gd7(μ3-OH)3(CO3)6(O2C t Bu)12] which has crystallographic C3h symmetry. Low temperature specific heat and adiabatic demagnetization experiments (the latter achieving temperatures below 100 mK), lead to the observation of the effects of both intramolecular dipolar interactions and geometric spin frustration. The dipolar interaction leads to a massive rearrangement of energy levels such that specific heat and entropy below 2 K are strongly modified while magnetic susceptibility and magnetization above 2 K are not affected. The consequences of these phenomena for low temperature magnetocaloric applications are discussed.

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Citations

Feb 22, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Angelos B CanajConstantinos J Milios
Apr 30, 2017·Chemical Science·Eufemio Moreno PinedaMario Ruben
Jan 27, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Jia-Wei WuShao-Wu Du
Aug 3, 2016·Chemistry : a European Journal·Guo-Jun ZhouYan-Zhen Zheng
Apr 14, 2017·Chemical Communications : Chem Comm·María José Heras OjeaMark Murrie
Aug 2, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Ya-Nan FengShao-Wu Du
Jan 26, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Kai WangFu-Pei Liang
Feb 17, 2018·Chemical Communications : Chem Comm·Wei HuangDayu Wu
Feb 17, 2017·Chemistry : a European Journal·Sourav BiswasVadapalli Chandrasekhar
Aug 4, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Simon AnsbroAlessandro Chiesa
Jul 16, 2021·The Journal of Physical Chemistry. a·Caleb HuizengaCaroline Chick Jarrold
Aug 16, 2019·Inorganic Chemistry·Foteini E KakaroniConstantinos J Milios
Jan 19, 2017·The Journal of Physical Chemistry. a·Nuno A G BandeiraCarles Bo
Jan 8, 2022·Dalton Transactions : an International Journal of Inorganic Chemistry·Krishna Sundar DasRaju Mondal

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Methods Mentioned

BETA
X-ray

Software Mentioned

14
CShM
SHELX
SUPERFLIP

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