Enhanced Exchange Bias Effect by Modulating Relative Ratio of Magnetic Ions in Y2Co2−xMnxO6 (x = 1.0–1.9)

Sang Hyub Oh, Jae Young Moon, Dong Gun Oh, Young Jai Choi, Nara Lee

Research output: Contribution to journalArticle

Abstract

It has recently been reported that the exchange bias (EB) phenomenon in double-perovskite Y2CoMnO6 ceramic arises from additional antiferromagnetic (AFM) clusters formed by the anti-sites of ionic disorders in the dominant ferromagnetic (FM) phase. To extensively examine the role of ionic orders and versatile magnetic interactions, we measure the magnetic properties of Y2Co2 − xMnxO6 (x = 1.0–1.9) compounds with different relative ratios of the magnetic ions. Upon increasing the ratio of Mn ions, the FM transition temperature is gradually lowered with a greatly enhanced EB effect for x ≥ 1.4. The measurement of heat capacity and AC magnetic susceptibility in the compound with x = 1.5 suggests the formation of magnetic cluster-glass state from short-range FM order with comparable AFM clusters generated by the formation of Mn3+–O2−–Mn3+ bonds. The dependence of the EB effect on the cooling field reveals the maximum EB field at 2 K to be HEB = 3.19 kOe. The large EB effect originates from the adjusted proportions of FM and AFM phases and the improved interfacial pinning of exchange coupling in the cluster-glass state. Our results, based on intricate magnetic correlations and phases, provide essential clues for exploring suitable ceramic compounds for magnetic functional applications.

Original languageEnglish
Article number1900008
JournalPhysica Status Solidi - Rapid Research Letters
Volume13
Issue number7
DOIs
Publication statusPublished - 2019 Jul

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Ions
Glass
Exchange coupling
Magnetic susceptibility
Perovskite
Superconducting transition temperature
Specific heat
Magnetic properties
ions
Cooling
ceramics
glass
alternating current
proportion
transition temperature
specific heat
disorders
magnetic properties
magnetic permeability
cooling

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Enhanced Exchange Bias Effect by Modulating Relative Ratio of Magnetic Ions in Y2Co2−xMnxO6 (x = 1.0–1.9)",
abstract = "It has recently been reported that the exchange bias (EB) phenomenon in double-perovskite Y2CoMnO6 ceramic arises from additional antiferromagnetic (AFM) clusters formed by the anti-sites of ionic disorders in the dominant ferromagnetic (FM) phase. To extensively examine the role of ionic orders and versatile magnetic interactions, we measure the magnetic properties of Y2Co2 − xMnxO6 (x = 1.0–1.9) compounds with different relative ratios of the magnetic ions. Upon increasing the ratio of Mn ions, the FM transition temperature is gradually lowered with a greatly enhanced EB effect for x ≥ 1.4. The measurement of heat capacity and AC magnetic susceptibility in the compound with x = 1.5 suggests the formation of magnetic cluster-glass state from short-range FM order with comparable AFM clusters generated by the formation of Mn3+–O2−–Mn3+ bonds. The dependence of the EB effect on the cooling field reveals the maximum EB field at 2 K to be HEB = 3.19 kOe. The large EB effect originates from the adjusted proportions of FM and AFM phases and the improved interfacial pinning of exchange coupling in the cluster-glass state. Our results, based on intricate magnetic correlations and phases, provide essential clues for exploring suitable ceramic compounds for magnetic functional applications.",
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Enhanced Exchange Bias Effect by Modulating Relative Ratio of Magnetic Ions in Y2Co2−xMnxO6 (x = 1.0–1.9). / Oh, Sang Hyub; Moon, Jae Young; Oh, Dong Gun; Choi, Young Jai; Lee, Nara.

In: Physica Status Solidi - Rapid Research Letters, Vol. 13, No. 7, 1900008, 07.2019.

Research output: Contribution to journalArticle

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