Neutron-depolarization analysis and small-angle neutron-scattering studies of the reentrant spin glass Ni77Mn23

Tetsuya Sato, T. Ando, T. Watanabe, S. Itoh, Y. Endoh, M. Furusaka

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Neutron-depolarization and small-angle neutron-scattering (SANS) measurements were performed to obtain some magnetic information in various spatial scales on the reentrant-spin-glass state of Ni77Mn23. The wavelength-dependent neutron polarization in the magnetic fields offered some information about the temperature-dependent magnetic-domain-wall motion and the magnetization rotation in domains, i.e., (1) the domain-wall motion decreases with decreasing temperature, and (2) the magnetization in each domain shows a rigid rotation at low temperatures and a dissipative nature at higher temperatures when applying a magnetic field. The SANS intensity peak at a finite momentum transfer q that appeared in the magnetic fields indicates the formation of a modulated structure of transverse spin components in the domain. The spin structure was interpreted as vortexlike so as to obtain a consistent interpretation about the low-temperature behavior of the period of oscillatory neutron polarization as a function of wavelength. The field and temperature dependences of SANS intensity were well interpreted in terms of the vortex spin structure. Finally, we had a picture that the magnetization process in the reentrant state is characterized by the nature of the domain-wall motion and the magnetization rotation that strongly correlates with the spin-modulated structure.

Original languageEnglish
Pages (from-to)6074-6086
Number of pages13
JournalPhysical Review B
Volume48
Issue number9
DOIs
Publication statusPublished - 1993

Fingerprint

Spin glass
Depolarization
Neutron scattering
depolarization
spin glass
Neutrons
neutron scattering
domain wall
neutrons
magnetization
Magnetization
Domain walls
magnetic fields
Magnetic fields
Temperature
polarization
magnetic domains
wavelengths
Polarization
momentum transfer

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Neutron-depolarization analysis and small-angle neutron-scattering studies of the reentrant spin glass Ni77Mn23. / Sato, Tetsuya; Ando, T.; Watanabe, T.; Itoh, S.; Endoh, Y.; Furusaka, M.

In: Physical Review B, Vol. 48, No. 9, 1993, p. 6074-6086.

Research output: Contribution to journalArticle

Sato, Tetsuya ; Ando, T. ; Watanabe, T. ; Itoh, S. ; Endoh, Y. ; Furusaka, M. / Neutron-depolarization analysis and small-angle neutron-scattering studies of the reentrant spin glass Ni77Mn23. In: Physical Review B. 1993 ; Vol. 48, No. 9. pp. 6074-6086.
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