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Title: Room-Temperature Ferromagnetic Insulating State in Cation-Ordered Double-Perovskite Sr 2Fe 1+ xRe 1– xO 6 Films

Abstract

Ferromagnetic insulators (FMIs) are one of the most important components in developing dissipationless electronic and spintronic devices. However, FMIs are innately rare to find in nature as ferromagnetism generally accompanies metallicity. Here, novel room–temperature FMI films that are epitaxially synthesized by deliberate control of the ratio between two B–site cations in the double perovskite Sr 2Fe 1+xRe 1–xO 6 (–0.2 ≤ x ≤ 0.2) are reported. In contrast to the known FM metallic phase in stoichiometric Sr2FeReO6, an FMI state with a high Curie temperature ( T c ≈ 400 K) and a large saturation magnetization ( M S ≈ 1.8 µB f.u. –1) is found in highly cation–ordered Fe–rich phases. The stabilization of the FMI state is attributed to the formation of extra Fe 3+–Fe 3+ and Fe 3+–Re 6+ bonding states, which originate from the relatively excess Fe ions owing to the deficiency in Re ions. As a result, the emerging FMI state created by controlling cations in the oxide double perovskites opens the door to developing novel oxide quantum materials and spintronic devices.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [3]; ORCiD logo [1];  [4]; ORCiD logo [5];  [2];  [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Drexel Univ., Philadelphia, PA (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1484996
Alternate Identifier(s):
OSTI ID: 1483909; OSTI ID: 1494590
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 31; Journal Issue: 4; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; epitaxy; ferromagnetic insulators; oxide perovskites; spectroscopy; Sr2FeReO6; ferromagnetic insulator; oxide perovskite

Citation Formats

Sohn, Changhee, Skoropata, Elizabeth M., Choi, Yongseong, Gao, Xiang, Rastogi, Ankur, Huon, Amanda, McGuire, Michael A., Nuckols, Lauren, Zhang, Yanwen, Freeland, John W., Haskel, Daniel, and Lee, Ho Nyung. Room-Temperature Ferromagnetic Insulating State in Cation-Ordered Double-Perovskite Sr2Fe1+xRe1–xO6 Films. United States: N. p., 2018. Web. doi:10.1002/adma.201805389.
Sohn, Changhee, Skoropata, Elizabeth M., Choi, Yongseong, Gao, Xiang, Rastogi, Ankur, Huon, Amanda, McGuire, Michael A., Nuckols, Lauren, Zhang, Yanwen, Freeland, John W., Haskel, Daniel, & Lee, Ho Nyung. Room-Temperature Ferromagnetic Insulating State in Cation-Ordered Double-Perovskite Sr2Fe1+xRe1–xO6 Films. United States. doi:10.1002/adma.201805389.
Sohn, Changhee, Skoropata, Elizabeth M., Choi, Yongseong, Gao, Xiang, Rastogi, Ankur, Huon, Amanda, McGuire, Michael A., Nuckols, Lauren, Zhang, Yanwen, Freeland, John W., Haskel, Daniel, and Lee, Ho Nyung. Thu . "Room-Temperature Ferromagnetic Insulating State in Cation-Ordered Double-Perovskite Sr2Fe1+xRe1–xO6 Films". United States. doi:10.1002/adma.201805389.
@article{osti_1484996,
title = {Room-Temperature Ferromagnetic Insulating State in Cation-Ordered Double-Perovskite Sr2Fe1+xRe1–xO6 Films},
author = {Sohn, Changhee and Skoropata, Elizabeth M. and Choi, Yongseong and Gao, Xiang and Rastogi, Ankur and Huon, Amanda and McGuire, Michael A. and Nuckols, Lauren and Zhang, Yanwen and Freeland, John W. and Haskel, Daniel and Lee, Ho Nyung},
abstractNote = {Ferromagnetic insulators (FMIs) are one of the most important components in developing dissipationless electronic and spintronic devices. However, FMIs are innately rare to find in nature as ferromagnetism generally accompanies metallicity. Here, novel room–temperature FMI films that are epitaxially synthesized by deliberate control of the ratio between two B–site cations in the double perovskite Sr2Fe1+xRe1–xO6 (–0.2 ≤ x ≤ 0.2) are reported. In contrast to the known FM metallic phase in stoichiometric Sr2FeReO6, an FMI state with a high Curie temperature (Tc ≈ 400 K) and a large saturation magnetization (MS ≈ 1.8 µB f.u.–1) is found in highly cation–ordered Fe–rich phases. The stabilization of the FMI state is attributed to the formation of extra Fe3+–Fe3+ and Fe3+–Re6+ bonding states, which originate from the relatively excess Fe ions owing to the deficiency in Re ions. As a result, the emerging FMI state created by controlling cations in the oxide double perovskites opens the door to developing novel oxide quantum materials and spintronic devices.},
doi = {10.1002/adma.201805389},
journal = {Advanced Materials},
issn = {0935-9648},
number = 4,
volume = 31,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
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