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

Cuijuan Zhang, Tomoya Tsuboi, Hiroaki Namba, Yasuaki Einaga, Takashi Yamamoto

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11 Citations (Scopus)


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

Original languageEnglish
Pages (from-to)13324-13331
Number of pages8
JournalDalton Transactions
Issue number34
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Inorganic Chemistry


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