Spin-wave and critical neutron scattering from chromium

Jens Aage Als-Nielsen; J.D. Axe; G. Shirane

doi:10.1063/1.1660389

Spin-wave and critical neutron scattering from chromium

Jens Aage Als-Nielsen
, J.D. Axe
, G. Shirane

Brookhaven National Laboratory

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Chromium and its dilute alloys are unique examples of magnetism caused by itinerant electrons. The magnetic excitations have been studied by inelastic neutron scattering using a high-resolution triple-axis spectrometer. Spin-wave peaks in q scans at constant energy transfer ℏω could, in general, not be clearly resolved at any temperature below TN but it is still possible to deduce the slope ω/q of the dispersion curve and also to estimate the spin-wave lifetimes. The scattering displays a divergence as q→0, ω→0, T→TN characteristic of critical fluctuations. The critical scattering is confined to small values of q, but the ω range is very wide compared to critical scattering from systems with localized magnetic moments

Original language	English
Journal	Journal of Applied Physics
Volume	42
Issue number	4
Pages (from-to)	1666-1671
ISSN	0021-8979
DOIs	https://doi.org/10.1063/1.1660389
Publication status	Published - 1971

Access to Document

10.1063/1.1660389

OpenUrl availability

Check availability in DTU Findit

Cite this

@article{90fdb172b4fe4583ae4d0894ba9109d9,

title = "Spin-wave and critical neutron scattering from chromium",

abstract = "Chromium and its dilute alloys are unique examples of magnetism caused by itinerant electrons. The magnetic excitations have been studied by inelastic neutron scattering using a high-resolution triple-axis spectrometer. Spin-wave peaks in q scans at constant energy transfer ℏω could, in general, not be clearly resolved at any temperature below TN but it is still possible to deduce the slope ω/q of the dispersion curve and also to estimate the spin-wave lifetimes. The scattering displays a divergence as q→0, ω→0, T→TN characteristic of critical fluctuations. The critical scattering is confined to small values of q, but the ω range is very wide compared to critical scattering from systems with localized magnetic moments",

author = "Als-Nielsen, \{Jens Aage\} and J.D. Axe and G. Shirane",

year = "1971",

doi = "10.1063/1.1660389",

language = "English",

volume = "42",

pages = "1666--1671",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "4",

}

TY - JOUR

T1 - Spin-wave and critical neutron scattering from chromium

AU - Als-Nielsen, Jens Aage

AU - Axe, J.D.

AU - Shirane, G.

PY - 1971

Y1 - 1971

N2 - Chromium and its dilute alloys are unique examples of magnetism caused by itinerant electrons. The magnetic excitations have been studied by inelastic neutron scattering using a high-resolution triple-axis spectrometer. Spin-wave peaks in q scans at constant energy transfer ℏω could, in general, not be clearly resolved at any temperature below TN but it is still possible to deduce the slope ω/q of the dispersion curve and also to estimate the spin-wave lifetimes. The scattering displays a divergence as q→0, ω→0, T→TN characteristic of critical fluctuations. The critical scattering is confined to small values of q, but the ω range is very wide compared to critical scattering from systems with localized magnetic moments

AB - Chromium and its dilute alloys are unique examples of magnetism caused by itinerant electrons. The magnetic excitations have been studied by inelastic neutron scattering using a high-resolution triple-axis spectrometer. Spin-wave peaks in q scans at constant energy transfer ℏω could, in general, not be clearly resolved at any temperature below TN but it is still possible to deduce the slope ω/q of the dispersion curve and also to estimate the spin-wave lifetimes. The scattering displays a divergence as q→0, ω→0, T→TN characteristic of critical fluctuations. The critical scattering is confined to small values of q, but the ω range is very wide compared to critical scattering from systems with localized magnetic moments

U2 - 10.1063/1.1660389

DO - 10.1063/1.1660389

M3 - Journal article

SN - 0021-8979

VL - 42

SP - 1666

EP - 1671

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 4

ER -

Spin-wave and critical neutron scattering from chromium

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this