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Title: Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1–xMnO6

Abstract

We present a comparative study of double perovskites Y2NixCo1–xMnO6 for x = 1, 0.5, and 0. The polycrystalline samples of Y2NixCo1–xMnO6 with space group P21/n were synthesized via sol-gel technique. X-ray photoelectron spectroscopy (XPS) confirms the presence of majority Ni2+/Mn4+ in Y2NiMnO6 (YNMO) and a mixed valence state Ni2+/3+/Co2+/3+/Mn4+/3+ in co-doped Y2Ni0.5Co0.5MnO6 (YNCMO). The temperature dependent magnetization results suggest homogeneous substitution of Ni ions with Co ions with minimal contribution of 3+ cationic magnetic interactions in YNCMO. The superexchange ferromagnetic (FM) interaction has a major contribution to the magnetism of YNMO. The strength of antiferromagnetic (AFM) coupling resulting from the antiphase boundaries in Y2NixCo1–xMnO6 increases with the increase in the Co concentration. The AC susceptibility (AC-χ) study further validates the presence of higher density of antiphase boundaries, which is reflected by the dynamics of domain walls in YNCMO. The isothermal magnetic entropy change (ΔSM) as functions of temperature and magnetic field is exploited to assess the stabilization of different magnetic phases. Finally, the findings of ΔSM (T,µ0H) lead to the proposed new magnetic phase diagrams for Y2NixCo1–xMnO6 for x = 1 and 0.5, in comparison with the previously established phase diagram of Y2CoMnO6.

Authors:
 [1];  [2];  [3];  [1];  [1]
+ Show Author Affiliations
  1. Univ. of South Florida, Tampa, FL (United States)
  2. Yale Univ., New Haven, CT (United States)
  3. Phenikaa University, Ha Dong (Vietnam)
Publication Date:
Research Org.:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1977235
Alternate Identifier(s):
OSTI ID: 1817244
Grant/Contract Number:  
FG02-07ER46438; FG02–07ER46438
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 888; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Chemistry; Materials Science; Metallurgy & Metallurgical Engineering; Double perovskites; Collective magnetism; magnetocaloric effect; Magnetic phase diagram

Citation Formats

Madhogaria, Richa Pokharel, Bingham, Nicholas S., Das, Raja, Phan, Manh-Huong, and Srikanth, Hariharan. Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1–xMnO6. United States: N. p., 2021. Web. doi:10.1016/j.jallcom.2021.161624.
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Madhogaria, Richa Pokharel, Bingham, Nicholas S., Das, Raja, Phan, Manh-Huong, & Srikanth, Hariharan. Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1–xMnO6. United States. https://doi.org/10.1016/j.jallcom.2021.161624
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Madhogaria, Richa Pokharel, Bingham, Nicholas S., Das, Raja, Phan, Manh-Huong, and Srikanth, Hariharan. Mon . "Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1–xMnO6". United States. https://doi.org/10.1016/j.jallcom.2021.161624. https://www.osti.gov/servlets/purl/1977235.
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@article{osti_1977235,
title = {Competing magnetic interactions and emergent phase diagrams in double perovskite Y2NixCo1–xMnO6},
author = {Madhogaria, Richa Pokharel and Bingham, Nicholas S. and Das, Raja and Phan, Manh-Huong and Srikanth, Hariharan},
abstractNote = {We present a comparative study of double perovskites Y2NixCo1–xMnO6 for x = 1, 0.5, and 0. The polycrystalline samples of Y2NixCo1–xMnO6 with space group P21/n were synthesized via sol-gel technique. X-ray photoelectron spectroscopy (XPS) confirms the presence of majority Ni2+/Mn4+ in Y2NiMnO6 (YNMO) and a mixed valence state Ni2+/3+/Co2+/3+/Mn4+/3+ in co-doped Y2Ni0.5Co0.5MnO6 (YNCMO). The temperature dependent magnetization results suggest homogeneous substitution of Ni ions with Co ions with minimal contribution of 3+ cationic magnetic interactions in YNCMO. The superexchange ferromagnetic (FM) interaction has a major contribution to the magnetism of YNMO. The strength of antiferromagnetic (AFM) coupling resulting from the antiphase boundaries in Y2NixCo1–xMnO6 increases with the increase in the Co concentration. The AC susceptibility (AC-χ) study further validates the presence of higher density of antiphase boundaries, which is reflected by the dynamics of domain walls in YNCMO. The isothermal magnetic entropy change (ΔSM) as functions of temperature and magnetic field is exploited to assess the stabilization of different magnetic phases. Finally, the findings of ΔSM (T,µ0H) lead to the proposed new magnetic phase diagrams for Y2NixCo1–xMnO6 for x = 1 and 0.5, in comparison with the previously established phase diagram of Y2CoMnO6.},
doi = {10.1016/j.jallcom.2021.161624},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 888,
place = {United States},
year = {Mon Aug 16 00:00:00 EDT 2021},
month = {Mon Aug 16 00:00:00 EDT 2021}
}
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https://doi.org/10.1016/j.jallcom.2021.161624
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