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Title: Phase transition of geometrically frustrated TbNiAl in a magnetic field

Abstract

The phase transitions of the geometrically frustrated antiferromagnet TbNiAl in a magnetic field are studied by means of neutron powder diffraction, ac susceptibility, and muon spin relaxation ({mu}SR) measurements. Neutron powder diffraction reveals that, in addition to antiferromagnetic order, ferromagnetic order is induced in a field as low as B{approx}0.02T . At higher fields, ferromagnetic and antiferromagnetic order coexist in different domains in the sample, and the domain balance depends on both magnetic field and temperature. Antiferromagnetic Bragg reflections are observed below a Neel temperature of T{sub N}=47K which is independent of the field. Ferromagnetic Bragg peaks are observed below a field-dependent Curie temperature which increases from {Tc}=52K at B=0.2T to {Tc}=70K at B=5T . Both phase transitions are concurrently observed in ac susceptibility and {mu}SR measurements.

Authors:
 [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931941
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 75; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRAGG CURVE; BRAGG REFLECTION; CURIE POINT; DIFFRACTION; MAGNETIC FIELDS; MUON SPIN RELAXATION; NEEL TEMPERATURE; NEUTRONS

Citation Formats

Ehlers, Georg. Phase transition of geometrically frustrated TbNiAl in a magnetic field. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.75.024420.
Ehlers, Georg. Phase transition of geometrically frustrated TbNiAl in a magnetic field. United States. doi:10.1103/PhysRevB.75.024420.
Ehlers, Georg. Mon . "Phase transition of geometrically frustrated TbNiAl in a magnetic field". United States. doi:10.1103/PhysRevB.75.024420.
@article{osti_931941,
title = {Phase transition of geometrically frustrated TbNiAl in a magnetic field},
author = {Ehlers, Georg},
abstractNote = {The phase transitions of the geometrically frustrated antiferromagnet TbNiAl in a magnetic field are studied by means of neutron powder diffraction, ac susceptibility, and muon spin relaxation ({mu}SR) measurements. Neutron powder diffraction reveals that, in addition to antiferromagnetic order, ferromagnetic order is induced in a field as low as B{approx}0.02T . At higher fields, ferromagnetic and antiferromagnetic order coexist in different domains in the sample, and the domain balance depends on both magnetic field and temperature. Antiferromagnetic Bragg reflections are observed below a Neel temperature of T{sub N}=47K which is independent of the field. Ferromagnetic Bragg peaks are observed below a field-dependent Curie temperature which increases from {Tc}=52K at B=0.2T to {Tc}=70K at B=5T . Both phase transitions are concurrently observed in ac susceptibility and {mu}SR measurements.},
doi = {10.1103/PhysRevB.75.024420},
journal = {Physical Review B},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}