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  6. TR 288: Elastic Tuning and Response of Electronic Quantum Phases of Matter of Electronic Q
  7. TR 288 - Elasto-Q-Mat: Research Data
  8. Colossal magnetoresistance in EuZn2P2 and its electronic and magnetic structure
 
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Title(s)
TitleLanguage
Colossal magnetoresistance in EuZn2P2 and its electronic and magnetic structure
en
 
Author(s)
NameORCIDGNDAffiliation
Krebber, Sarah 
Physics 
 
Project(s)
TRR 288: Elastic Tuning and Response of Electronic Quantum Phases of Matter 
 
Faculty
13 Physics
 
DFG-Subject
307-01 Experimental Condensed Matter Physics
 
Date Issued
12 July 2023
 
Publisher(s)
Goethe-Universität Frankfurt
 
Handle
https://gude.uni-frankfurt.de/handle/gude/292
 
DOI
10.25716/gude.0gk8-as0=
 

Type(s) of data
Dataset
 
Language(s)
en
 
Abstract(s)
AbstractLanguage
We investigate single crystals of the trigonal antiferromagnet EuZn2P2 (P-3m1) by means of electrical trans-
port, magnetization measurements, x-ray magnetic scattering, optical reflectivity, angle-resolved photoemission
spectroscopy (ARPES), and ab initio band structure calculations (DFT + U ). We find that the electrical resistivity
of EuZn2P2 increases strongly upon cooling and can be suppressed in magnetic fields by several orders of
magnitude (colossal magnetoresistance effect). Resonant magnetic scattering reveals a magnetic ordering vector
of q = (0 0 1/2 ), corresponding to an A-type antiferromagnetic order, below TN = 23.7 K. We find that the
moments are canted out of the a-a plane by an angle of about 40° ± 10° and aligned along the [100] direction
in the a-a plane. We observe nearly isotropic magnetization behavior for low fields and low temperatures which
is consistent with the magnetic scattering results. The magnetization measurements show a deviation from the
Curie-Weiss behavior below ≈150 K, the temperature below which also the field dependence of the material’s
resistivity starts to increase. An analysis of the infrared reflectivity spectrum at T = 295 K allows us to resolve
the main phonon bands and intraband and interband transitions, and estimate indirect and direct band gaps of
E_opt,i = 0.09 and E_opt,d = 0.33 eV, respectively, which are in good agreement with the theoretically predicted
ones. The experimental band structure obtained by ARPES is nearly T independent above and below T_N . The
comparison of the theoretical and experimental data shows a weak intermixing of the Eu 4f states close to the
point with the bands formed by the phosphorous 3p orbitals leading to an induction of a small magnetic moment
at the P sites.
en
 
Description(s)
DescriptionLanguage
Raw data of the figures from the original publication.
The data are available both as Origin file or as plain ASCI data.
en
 

Related Resource(s)
Type of identifierIdentifierType of publicationType of relation
DOI
10.1103/PhysRevB.108.045116
JournalArticle
IsSupplementTo
 

License
Creative Commons Attribution 4.0 International (CC BY 4.0) cclicense-logocclicense-logo
 

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60
Acquisition Date
May 11, 2025
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