Low energy nuclear spin excitations in HoAl2 investigated by high resolution neutron spectroscopy

Tapan Chatterji; Niina Jalarvo; Andrzej Szytula

doi:10.1016/j.ssc.2013.02.024

Low energy nuclear spin excitations in HoAl₂ investigated by high resolution neutron spectroscopy

Tapan Chatterji, Niina Jalarvo, Andrzej Szytula

Chemical Spectroscopy

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Abstract

We have investigated low energy excitations in metallic HoAl₂ by high resolution neutron spectroscopy. At T=3 K we found clear inelastic peaks in the energy loss and energy gain sides along with the central elastic peak. We interpret these inelastic peaks to be due to the transitions from hyperfine-split nuclear levels. The energy which is E=25.03±0.02μeV at T=3 K, decreases continuously and becomes zero at ^TN≈30K. The intensity of the inelastic peak remains more or less constant as a function temperature before the it merges with the central elastic peak at T_N. The energy of nuclear spin excitations in HoAl₂ seems to follow the order parameter of the ferromagnetic phase transition.

Original language	English
Pages (from-to)	42-45
Number of pages	4
Journal	Solid State Communications
Volume	161
DOIs	https://doi.org/10.1016/j.ssc.2013.02.024
State	Published - May 2013

Keywords

D.
E.
Ferromagnetic phase transition
Hyperfine interaction
Neutron scattering
Nuclear spin excitations

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title = "Low energy nuclear spin excitations in HoAl2 investigated by high resolution neutron spectroscopy",

abstract = "We have investigated low energy excitations in metallic HoAl2 by high resolution neutron spectroscopy. At T=3 K we found clear inelastic peaks in the energy loss and energy gain sides along with the central elastic peak. We interpret these inelastic peaks to be due to the transitions from hyperfine-split nuclear levels. The energy which is E=25.03±0.02μeV at T=3 K, decreases continuously and becomes zero at TN≈30K. The intensity of the inelastic peak remains more or less constant as a function temperature before the it merges with the central elastic peak at TN. The energy of nuclear spin excitations in HoAl2 seems to follow the order parameter of the ferromagnetic phase transition.",

keywords = "D., E., Ferromagnetic phase transition, Hyperfine interaction, Neutron scattering, Nuclear spin excitations",

author = "Tapan Chatterji and Niina Jalarvo and Andrzej Szytula",

year = "2013",

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doi = "10.1016/j.ssc.2013.02.024",

language = "English",

volume = "161",

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journal = "Solid State Communications",

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T1 - Low energy nuclear spin excitations in HoAl2 investigated by high resolution neutron spectroscopy

AU - Chatterji, Tapan

AU - Jalarvo, Niina

AU - Szytula, Andrzej

PY - 2013/5

Y1 - 2013/5

N2 - We have investigated low energy excitations in metallic HoAl2 by high resolution neutron spectroscopy. At T=3 K we found clear inelastic peaks in the energy loss and energy gain sides along with the central elastic peak. We interpret these inelastic peaks to be due to the transitions from hyperfine-split nuclear levels. The energy which is E=25.03±0.02μeV at T=3 K, decreases continuously and becomes zero at TN≈30K. The intensity of the inelastic peak remains more or less constant as a function temperature before the it merges with the central elastic peak at TN. The energy of nuclear spin excitations in HoAl2 seems to follow the order parameter of the ferromagnetic phase transition.

AB - We have investigated low energy excitations in metallic HoAl2 by high resolution neutron spectroscopy. At T=3 K we found clear inelastic peaks in the energy loss and energy gain sides along with the central elastic peak. We interpret these inelastic peaks to be due to the transitions from hyperfine-split nuclear levels. The energy which is E=25.03±0.02μeV at T=3 K, decreases continuously and becomes zero at TN≈30K. The intensity of the inelastic peak remains more or less constant as a function temperature before the it merges with the central elastic peak at TN. The energy of nuclear spin excitations in HoAl2 seems to follow the order parameter of the ferromagnetic phase transition.

KW - D.

KW - E.

KW - Ferromagnetic phase transition

KW - Hyperfine interaction

KW - Neutron scattering

KW - Nuclear spin excitations

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DO - 10.1016/j.ssc.2013.02.024

M3 - Article

AN - SCOPUS:84876386810

SN - 0038-1098

VL - 161

SP - 42

EP - 45

JO - Solid State Communications

JF - Solid State Communications

ER -

Low energy nuclear spin excitations in HoAl₂ investigated by high resolution neutron spectroscopy

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