Mechanomagnetics in Elastic Crystals: Insights from [Cu(acac)2 ].
Angew Chem Int Ed Engl
; 58(42): 15082-15088, 2019 Oct 14.
Article
em En
| MEDLINE
| ID: mdl-31452321
ABSTRACT
We predict that the magnetic properties of [Cu(acac)2 ], an elastically flexible crystal, change drastically when the crystal is bent. It is found that unbent [Cu(acac)2 ] is an almost perfect Tomonaga-Luttinger liquid. Broken-symmetry density-functional calculations reveal that the magnetic exchange interactions along the chains are an order of magnitude larger than the interchain exchange. The geometrically frustrated interchain interactions cannot magnetically order the material at any experimentally accessible temperature. The ordering temperature (TN ), calculated from the chain-random-phase approximation, increases by 24 orders of magnitude when the material is bent. We demonstrate that geometric frustration both suppresses TN and enhances the sensitivity of TN to bending. In [Cu(acac)2 ], TN is extremely sensitive to bending but remains too low for practical applications, even when bent. Partially frustrated materials could achieve the balance of high TN and good sensitivity to bending required for practical applications of mechanomagnetic elastic crystals.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Austrália