Above-room-temperature coupling between ferroelastic domains and magnetism in an organic-inorganic hybrid:CsCu(HCOO)2Cl,Physical Review Materials

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Above-room-temperature coupling between ferroelastic domains and magnetism in an organic-inorganic hybrid:CsCu(HCOO)2Cl
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-07-14 , DOI: 10.1103/physrevmaterials.5.074405
Junyan Zhou _{1,

2} , Shifeng Jin _{1,

2} , Ruijin Sun ₃ , Congcong Chai _{1,

4} , Munan Hao _{1,

2} , Xin Zhong ₁ , Xiaolong Chen _{1,

2,

5}

Affiliation

Coupling between ferroelastic domains and magnetism (CFM) is usually observed in ferromagnetic phases where an easily magnetized direction can change with the movement of ferroelastic domains. Organic-inorganic hybrids (OIHs) are expected to enhance the coupling due to their low elastic modules. However, it is challenging to find CFM above room temperature in OIHs since the magnetic orderings are generally at low temperatures. The occurrence of CFM without magnetic ordering remains a question. Here, we report an interesting OIH:

CsCu {(HCOO)}_{2} Cl

, where canted antiferromagnetic and ferroelastic ordering occur at 32 and 331 K, respectively. Induced by Cu dimers,

CsCu {(HCOO)}_{2} Cl

shows large magnetic anisotropy at room temperature, the strength of which is twice that below 32 K. It is an example of an OIH showing that ferroelastic domains can couple with magnetism above room temperature. Moreover, our findings present a way to realize room-temperature CFM in OIHs and enhance our understanding of CFM.

中文翻译：

有机-无机杂化物中铁弹性畴与磁性之间的室温以上耦合：CsCu(HCOO)2Cl

铁弹性域和磁性 (CFM) 之间的耦合通常在铁磁相中观察到，其中容易磁化的方向会随着铁弹性域的移动而改变。有机 - 无机杂化物（OIH）由于其低弹性模块而有望增强耦合。然而，在 OIH 中找到高于室温的 CFM 具有挑战性，因为磁性排序通常处于低温下。没有磁序的 CFM 的出现仍然是一个问题。在这里，我们报告一个有趣的 OIH：