scholarly journals Temperature-dependent vacuum tunneling spectroscopy of rare-earth manganates showing colossal magnetoresistance and charge ordering

1998 ◽  
Vol 66 (7) ◽  
pp. S1213-S1216 ◽  
Author(s):  
A. Biswas ◽  
A.K. Raychaudhuri ◽  
A. Arulraj ◽  
C.N.R. Rao
Keyword(s):  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Tunneling Spectroscopy ◽  
Charge Ordering ◽  
Temperature Dependent

scholarly journals Investigation of Lattice Effects in Rare Earth Manganites by 18O-isotope Exchange

1999 ◽  
Vol 52 (2) ◽  
pp. 235 ◽  
Author(s):  
R. Mahesh ◽  
M. Itoh
Keyword(s):  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Charge Ordering ◽  
Perovskite Manganites ◽  
Lattice Effects ◽  
Jahn Teller ◽  
18O Isotope ◽  
Ionic Size ◽  
Rare Earth Manganites ◽  
A Site

The strong coupling between the electron spin and lattice arising from the Jahn-Teller effect of manganese ions plays an important role in the mechanism of colossal magnetoresistance and related properties of the rare earth manganites. The lattice effects in this class of oxides have been extensively studied through the application of hydrostatic as well as chemical pressures and magnetic fields. The recently observed giant 18O isotope effect provides direct evidence for the formation of lattice polarons in manganites. Here we report the preliminary results of our investigations on a variety of normal as well as 18O isotope-exchanged perovskite manganites exhibiting colossal magnetoresistance and charge ordering. The observed isotope shift of Tc as well as that of Tco is correlated with the key parameters controlling the lattice such as the Mn 3+ content, the average ionic radius of the A-site cation ⟨rA⟩ , and the A-site ionic size disorder σ2 .

Temperature-induced structural phase transitions in RERhSn (RE = Y, Gd-Tm, Lu)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Simon Engelbert ◽  
Rolf-Dieter Hoffmann ◽  
Jutta Kösters ◽  
Steffen Klenner ◽  
Rainer Pöttgen
Keyword(s):  
Rare Earth ◽  
Phase Transitions ◽  
Driving Force ◽  
Room Temperature ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
Line Broadening ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray

Abstract The structures of the equiatomic stannides RERhSn with the smaller rare earth elements Y, Gd-Tm and Lu were reinvestigated on the basis of temperature-dependent single crystal X-ray diffraction data. GdRhSn crystallizes with the aristotype ZrNiAl at 293 and 90 K. For RE = Y, Tb, Ho and Er the HP-CeRuSn type (approximant with space group R3m) is already formed at room temperature, while DyRhSn adopts the HP-CeRuSn type below 280 K. TmRhSn and LuRhSn show incommensurate modulated variants with superspace groups P31m(1/3; 1/3; γ) 000 (No. 157.1.23.1) (γ = 3/8 for TmRhSn and γ = 2/5 for LuRhSn). The driving force for superstructure formation (modulation) is a strengthening of Rh–Sn bonding. The modulation is expressed in a 119Sn Mössbauer spectrum of DyRhSn at 78 K through line broadening.

Magnetic Properties and Negative Colossal Magnetoresistance of the Rare Earth Zintl phase EuIn2As2

2008 ◽  
Vol 47 (23) ◽  
pp. 11048-11056 ◽  
Author(s):  
Andrea M. Goforth ◽  
Peter Klavins ◽  
James C. Fettinger ◽  
Susan M. Kauzlarich
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Colossal Magnetoresistance ◽  
Zintl Phase ◽  
The Rare Earth

Temperature-dependent luminescence and energy transfer in Europium and rare-earth-codoped nanostructured sol-gel SiO 2 glasses

1999 ◽  
Author(s):  
Srinivasa Buddhudu ◽  
Makoto Morita ◽  
Hong X. Zhang ◽  
Chan Hin Kam ◽  
Yee Loy Lam ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Sol Gel ◽  
Temperature Dependent

Temperature dependent electrical properties of rare-earth metal Er Schottky contact on p-type InP

2013 ◽  
Author(s):  
L. Dasaradha Rao ◽  
N. Ramesha Reddy ◽  
A. Ashok Kumar ◽  
V. Rajagopal Reddy
Keyword(s):  
Rare Earth ◽  
Electrical Properties ◽  
Rare Earth Metal ◽  
Schottky Contact ◽  
Earth Metal ◽  
Temperature Dependent ◽  
P Type
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