Ferromagnetic domain nucleation and growth in colossal magnetoresistive manganite

Yasukazu Murakami, H. Kasai, J. J. Kim, S. Mamishin, D. Shindo, S. Mori, A. Tonomura

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Colossal magnetoresistance is a dramatic decrease in resistivity caused by applied magnetic fields1-4, and has been the focus of much research because of its potential for magnetic data storage using materials such as manganites. Although extensive microscopy and theoretical studies5-11 have shown that colossal magnetoresistance involves competing insulating and ferromagnetic conductive phases, the mechanism underlying the effect remains unclear. Here, by directly observing magnetic domain walls and flux distributions using cryogenic Lorentz microscopy and electron holography 12-14, we demonstrate that an applied magnetic field assists nucleation and growth of an ordered ferromagnetic phase. These results provide new insights into the evolution dynamics of complex domain structures at the nanoscale, and help to explain anomalous phase separation phenomena that are relevant for applications3,15-19. Our approach can also be used to determine magnetic parameters of nanoscale regions, such as magnetocrystalline anisotropy and exchange stiffness, without bulk magnetization results or neutron scattering data.

Original languageEnglish
Pages (from-to)37-41
Number of pages5
JournalNature Nanotechnology
Volume5
Issue number1
DOIs
Publication statusPublished - Jan 1 2010

Fingerprint

Colossal magnetoresistance
Microscopic examination
Nucleation
Electron holography
nucleation
Magnetic storage
microscopy
Magnetocrystalline anisotropy
Manganites
Magnetic domains
Domain walls
data storage
magnetic domains
Neutron scattering
Phase separation
holography
Cryogenics
cryogenics
domain wall
Magnetization

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Ferromagnetic domain nucleation and growth in colossal magnetoresistive manganite. / Murakami, Yasukazu; Kasai, H.; Kim, J. J.; Mamishin, S.; Shindo, D.; Mori, S.; Tonomura, A.

In: Nature Nanotechnology, Vol. 5, No. 1, 01.01.2010, p. 37-41.

Research output: Contribution to journalArticle

Murakami, Y, Kasai, H, Kim, JJ, Mamishin, S, Shindo, D, Mori, S & Tonomura, A 2010, 'Ferromagnetic domain nucleation and growth in colossal magnetoresistive manganite', Nature Nanotechnology, vol. 5, no. 1, pp. 37-41. https://doi.org/10.1038/nnano.2009.342
Murakami, Yasukazu ; Kasai, H. ; Kim, J. J. ; Mamishin, S. ; Shindo, D. ; Mori, S. ; Tonomura, A. / Ferromagnetic domain nucleation and growth in colossal magnetoresistive manganite. In: Nature Nanotechnology. 2010 ; Vol. 5, No. 1. pp. 37-41.
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