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Title: Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system

Abstract

Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydrostatic pressures up to 15 kbar and of the thermal expansion were made for the Eu/sub x/Yb/sub 1-x/ alloy system (x less than or equal to 0.4) in temperatures from 1.6 to 400 K. The paramagnetic-ferromagnetic transition temperature T/sub c/ versus pressure p curve for x = 0.025 has a maximum near p = 1 kbar. For x = 0.25, T/sub c/ decreases and the ferromagnetic--spin-glass-like transition temperature T/sub t/ increases at rates of ..delta..T/sub c//..delta..p = -9.5 K/kbar and ..delta..T/sub t//..delta..p = +1.7 K/kbar, respectively. The ferromagnetic region disappears near p = 2.5 kbar, and above it the paramagnetic--spin-glass-like transition temperature T/sub g/, which is pressure insensitive, appears. The T/sub g/ value for x = 0.35 decreases initially and increases slowly with increasing p above p = 2 kbar at a rate of ..delta..T/sub g//..delta..p = +0.15 K/kbar. Both the magnetization in the ferromagnetic concentration range and the value of the ac magnetic susceptibility near T/sub g/ in the spin-glass-like state decrease with increasing p. From electrical-resistivity measurements under various pressures, semiconducting character was observed at the ambient pressure for x = 0.35 and the transition from semimetallicmore » to semiconducting states appears with increasing p for x = 0.025. Thermal expansion shows the large positive volume magnetostriction.« less

Authors:
; ;
Publication Date:
Research Org.:
Faculty of Science, Hiroshima University, 1-1-89 Higashisenda, Hiroshima 730, Japan
OSTI Identifier:
6324370
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 32:11
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; EUROPIUM ALLOYS; ELECTRIC CONDUCTIVITY; MAGNETIC SUSCEPTIBILITY; PHASE TRANSFORMATIONS; YTTERBIUM ALLOYS; BINARY ALLOY SYSTEMS; FERROMAGNETISM; MAGNETOSTRICTION; PARAMAGNETISM; PRESSURE DEPENDENCE; RUDERMAN-KITTEL COUPLING; ALLOY SYSTEMS; ALLOYS; COUPLING; ELECTRICAL PROPERTIES; MAGNETIC PROPERTIES; MAGNETISM; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; 360104* - Metals & Alloys- Physical Properties

Citation Formats

Kadomatsu, H, Tsutaoka, T, and Fujiwara, H. Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system. United States: N. p., 1985. Web. doi:10.1103/PhysRevB.32.7483.
Kadomatsu, H, Tsutaoka, T, & Fujiwara, H. Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system. United States. https://doi.org/10.1103/PhysRevB.32.7483
Kadomatsu, H, Tsutaoka, T, and Fujiwara, H. 1985. "Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system". United States. https://doi.org/10.1103/PhysRevB.32.7483.
@article{osti_6324370,
title = {Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system},
author = {Kadomatsu, H and Tsutaoka, T and Fujiwara, H},
abstractNote = {Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydrostatic pressures up to 15 kbar and of the thermal expansion were made for the Eu/sub x/Yb/sub 1-x/ alloy system (x less than or equal to 0.4) in temperatures from 1.6 to 400 K. The paramagnetic-ferromagnetic transition temperature T/sub c/ versus pressure p curve for x = 0.025 has a maximum near p = 1 kbar. For x = 0.25, T/sub c/ decreases and the ferromagnetic--spin-glass-like transition temperature T/sub t/ increases at rates of ..delta..T/sub c//..delta..p = -9.5 K/kbar and ..delta..T/sub t//..delta..p = +1.7 K/kbar, respectively. The ferromagnetic region disappears near p = 2.5 kbar, and above it the paramagnetic--spin-glass-like transition temperature T/sub g/, which is pressure insensitive, appears. The T/sub g/ value for x = 0.35 decreases initially and increases slowly with increasing p above p = 2 kbar at a rate of ..delta..T/sub g//..delta..p = +0.15 K/kbar. Both the magnetization in the ferromagnetic concentration range and the value of the ac magnetic susceptibility near T/sub g/ in the spin-glass-like state decrease with increasing p. From electrical-resistivity measurements under various pressures, semiconducting character was observed at the ambient pressure for x = 0.35 and the transition from semimetallic to semiconducting states appears with increasing p for x = 0.025. Thermal expansion shows the large positive volume magnetostriction.},
doi = {10.1103/PhysRevB.32.7483},
url = {https://www.osti.gov/biblio/6324370}, journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 32:11,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 1985},
month = {Sun Dec 01 00:00:00 EST 1985}
}