Coupling of Magnetic and Elastic Domains in the Organic–Inorganic Layered Perovskite‐Like (C₆H₅C₂H₄NH₃)₂Fe^IICl₄Crystal

Abstract

Multiferroic materials coupling ferroelasticity and ferromagnetism show strong magnetoelastic effects as magnetization is induced by mechanical stress or alternately strain induced by applying a magnetic field. These effects were reported for inorganic multiferroics such as LaCoxSr1−xO3. (C6H5C2H4NH3)2FeIICl4 is the first example of an organic–inorganic perovskite to exhibit such effects below the canted antiferromagnetism at TC=98 K and ferroelasticity at TC=433 K. This is shown by switching the magnetic hysteresis on and off by uniaxial pressure through the strong coupling of the magnetic and elastic domains. The spin‐canting direction was controlled by mechanical stress in the heating and cooling cycles. This unique observation gives additional impetus in the search for coupled hysteretic effect in organic–inorganic multiferroics.

High-temperature ferroelastic phase transition in a perovskite-like complex: [Et4N]2[PbBr3]2

“…In recent years, the organic-inorganic perovskite-type hybrids attract increasing attention owing to their diverse applications in data communication, rewritable optical data storage, thermal energy storage and mechanical energy transfer, etc. 7,[37][38][39][40][41][42][43][44][45][46][47][48] For example, an organic-inorganic perovskite piezoelectric, Me 3 -NCH 2 ClMnCl 3 , exhibits a piezoelectric coefficient d 33 of 185 pC N À1 . Such a large d 33 makes it a molecular material with a piezoelectric coefficient comparable with that of piezoelectric ceramics such as BaTiO 3 and a high phase-transition temperature of 406 K beyond that of BaTiO 3 (393 K).…”

Metal ion induced dual switchable dielectric and luminescent properties in hybrid halides

“…In recent years, organic-inorganic hybrid materials [1][2][3][4] with multiple functions have received widespread attention in the fields of optoelectronics, 5,6 photoluminescence, [7][8][9] and sensors because of their excellent ferroelectric properties, [10][11][12][13][14] optical properties, dielectric properties, and phase transition properties. [15][16][17][18] Compared with traditional inorganic or organic non-hybrid materials, the obvious advantage of organic-inorganic hybrid materials [19][20][21] lies in the modification of their structure, which in turn achieves richer functions, such as photoluminescence, dual-phase change, and so on.…”