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Title: Minority-spin t 2gstates and the degree of spin polarization in ferromagnetic metallic La 2-2xSr 1+2xMn 2O 7 (x = 0.38)

Abstract

In this paper, a half-metal is a material with conductive electrons of one spin orientation. This type of substance has been extensively searched for due to the fascinating physics as well as the potential applications for spintronics. Ferromagnetic manganites are considered to be good candidates, though there is no conclusive evidence for this notion. Here we show that the ferromagnet La 2–2xSr 1+2xMn 2O 7 (x = 0.38) possesses minority-spin states, challenging whether any of the manganites may be true half-metals. However, when electron transport properties are taken into account on the basis of the electronic band structure, we found that the La 2–2xSr 1+2xMn 2O 7 (x = 0.38) can essentially behave like a complete half metal.

Authors:
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [4];  [5];  [5];  [2]
  1. Univ. of Colorado, Boulder, CO (United States); Univ. of Science and Technology of China, Anhui (People's Republic of China)
  2. Univ. of Colorado, Boulder, CO (United States)
  3. Northeastern Univ., Boston, MA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1395129
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic properties and materials; Spintronics

Citation Formats

Sun, Z., Wang, Q., Douglas, J. F., Lin, H., Sahrakorpi, S., Barbiellini, B., Markiewicz, R. S., Bansil, A., Fedorov, A. V., Rotenberg, E., Zheng, H., Mitchell, J. F., and Dessau, D. S.. Minority-spin t2gstates and the degree of spin polarization in ferromagnetic metallic La2-2xSr1+2xMn2O7 (x = 0.38). United States: N. p., 2013. Web. doi:10.1038/srep03167.
Sun, Z., Wang, Q., Douglas, J. F., Lin, H., Sahrakorpi, S., Barbiellini, B., Markiewicz, R. S., Bansil, A., Fedorov, A. V., Rotenberg, E., Zheng, H., Mitchell, J. F., & Dessau, D. S.. Minority-spin t2gstates and the degree of spin polarization in ferromagnetic metallic La2-2xSr1+2xMn2O7 (x = 0.38). United States. doi:10.1038/srep03167.
Sun, Z., Wang, Q., Douglas, J. F., Lin, H., Sahrakorpi, S., Barbiellini, B., Markiewicz, R. S., Bansil, A., Fedorov, A. V., Rotenberg, E., Zheng, H., Mitchell, J. F., and Dessau, D. S.. Thu . "Minority-spin t2gstates and the degree of spin polarization in ferromagnetic metallic La2-2xSr1+2xMn2O7 (x = 0.38)". United States. doi:10.1038/srep03167. https://www.osti.gov/servlets/purl/1395129.
@article{osti_1395129,
title = {Minority-spin t2gstates and the degree of spin polarization in ferromagnetic metallic La2-2xSr1+2xMn2O7 (x = 0.38)},
author = {Sun, Z. and Wang, Q. and Douglas, J. F. and Lin, H. and Sahrakorpi, S. and Barbiellini, B. and Markiewicz, R. S. and Bansil, A. and Fedorov, A. V. and Rotenberg, E. and Zheng, H. and Mitchell, J. F. and Dessau, D. S.},
abstractNote = {In this paper, a half-metal is a material with conductive electrons of one spin orientation. This type of substance has been extensively searched for due to the fascinating physics as well as the potential applications for spintronics. Ferromagnetic manganites are considered to be good candidates, though there is no conclusive evidence for this notion. Here we show that the ferromagnet La2–2xSr1+2xMn2O7 (x = 0.38) possesses minority-spin states, challenging whether any of the manganites may be true half-metals. However, when electron transport properties are taken into account on the basis of the electronic band structure, we found that the La2–2xSr1+2xMn2O7 (x = 0.38) can essentially behave like a complete half metal.},
doi = {10.1038/srep03167},
journal = {Scientific Reports},
issn = {2045-2322},
number = 1,
volume = 3,
place = {United States},
year = {2013},
month = {11}
}

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Works referenced in this record:

Spintronics: A Spin-Based Electronics Vision for the Future
journal, November 2001

  • Wolf, S. A.; Awschalom, D. D.; Buhrman, R. A.
  • Science, Vol. 294, Issue 5546, p. 1488-1495
  • DOI: 10.1126/science.1065389