Enhancement of the coercivity in Co–Ni layered double hydroxides by increasing basal spacing

摘要: The magnetic properties of layered double hydroxides (LDH) containing transition metal ions can still develop, compared with hydroxide salts which exhibit structure-dependent magnetism. In this article, we report the preparation a hybrid magnet composed Co-Ni LDH and n-alkylsulfonate anions (Co-Ni-CnSO3 LDH). As is anion-exchangeable, systematically control interlayer spacing by intercalating n-alkylsulfonates different carbon numbers. were examined temperature- field-dependent magnetization measurements. result, have revealed that coercive field depends on basal spacing. It suggested increasing varies competition between in-plane superexchange interactions long-range out-of-plane dipolar interactions. Moreover, jump in at around 20 A assumed to be modification ordering Co-Ni-CnSO3 LDH.