Two-Dimensional AXenes: A New Family of Room-Temperature d0 Ferromagnets and Their Structural Phase Transitions

2019 ◽  
Vol 10 (24) ◽  
pp. 7753-7759 ◽  
Author(s):  
Xue Jiang ◽  
Qinxi Liu ◽  
Jianpei Xing ◽  
Jijun Zhao
Keyword(s):  
Phase Transitions ◽  
Room Temperature ◽  
Structural Phase ◽  
Two Dimensional ◽  
Structural Phase Transitions ◽  
New Family

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.

Temperature-Induced Structural Phase Transitions in a Two-Dimensional Self-Assembled Network

2013 ◽  
Vol 135 (32) ◽  
pp. 12068-12075 ◽  
Author(s):  
Matthew O. Blunt ◽  
Jinne Adisoejoso ◽  
Kazukuni Tahara ◽  
Keisuke Katayama ◽  
Mark Van der Auweraer ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Two Dimensional ◽  
Structural Phase Transitions ◽  
Self Assembled

Pressure-induced structural phase transitions in a two-dimensional system

2009 ◽  
Vol 79 (10) ◽  
Author(s):  
Pablo F. Damasceno ◽  
Luis Gustavo V. Gonçalves ◽  
José Pedro Rino ◽  
Rita de Cássia M. T. de Oliveira
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Dimensional System ◽  
Two Dimensional ◽  
Structural Phase Transitions ◽  
Two Dimensional System

Release of Tetrahydrofuran, Structural Phase Transitions and Dynamic Relaxation Processes in Ca (BH4)2

2012 ◽  
Vol 184 ◽  
pp. 24-32 ◽  
Author(s):  
Annalisa Paolone ◽  
O. Palumbo ◽  
P. Rispoli ◽  
Rosario Cantelli ◽  
E. Rönnebro ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Room Temperature ◽  
Structural Phase ◽  
Young Modulus ◽  
Relaxation Processes ◽  
Structural Phase Transitions ◽  
Exponential Factor ◽  
Β Phase ◽  
Α Phase ◽  
Calcium Borohydride

Various calcium borohydride samples were investigated by means of combined measurements of thermogravimetry and mass spectrometry, and anelastic spectroscopy. On heating, the release of 2-5% tetrahydrofuran (THF) is detected in all the samples at temperatures below ~480 K, even in those which were previously thermally treated, according to procedures known from the literature, in order to remove the solvent. Dehydrogenation takes place above 480 K. Above room temperature the temperature dependence of the Young modulus of Ca (BH4)2clearly monitors the release of THF and two irreversible structural phase transitions: from the α to the α’ phase around 460 K and from the α’ to the β phase, nearly completely evolved around 590 K. Moreover, the coefficient of elastic energy dissipation presents two dynamic processes below room temperature; a peak around 120 K characterized by an activation energy of 0.20 eV and a pre-exponential factor typical of atom-cluster relaxations, that we attributed to the dynamics of THF molecules retained in the borohydride lattice, and a peak around 200 K, possibly due to the relaxation of H vacancies.

Phase and Structural Behaviour in the NdAlO3-EuAlO3 System

2013 ◽  
Vol 200 ◽  
pp. 93-99 ◽  
Author(s):  
Natalia Ohon ◽  
Leonid Vasylechko ◽  
Yurii Prots ◽  
Marcus Schmidt ◽  
Caroline Curfs
Keyword(s):  
Phase Diagram ◽  
Phase Transitions ◽  
Binary System ◽  
Solid Solutions ◽  
Room Temperature ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
Structural Behaviour ◽  
First Order

Phase and structural behaviour in the NdAlO3–EuAlO3 system has been studied in the whole concentration range. Depending on x two kinds of solid solutions Nd1‑xEuxAlO3 exist at room temperature: one with rhombohedral (x < 0.15) and one with orthorhombic (x≈ 0.15–0.20, where the co-existence of both phases was observed. First-order structural phase transitions Pbnm↔Rc has been detected in Nd1-xEuxAlO3 with x = 0.3, 0.4, 0.6 at 520 K, 627 K and 988 K, respectively. Based on the experimental and literature data, the phase diagram of the pseudo-binary system NdAlO3–EuAlO3 has been constructed.

Charge doping induced reversible multistep structural phase transitions and electromechanical actuation in two-dimensional 1T′-MoS2

Nanoscale ◽  
2020 ◽  
Vol 12 (23) ◽  
pp. 12541-12550 ◽  
Author(s):  
Kaiyun Chen ◽  
Junkai Deng ◽  
Qian Shi ◽  
Xiangdong Ding ◽  
Jun Sun ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Charge Density Wave ◽  
Large Strain ◽  
Structural Phase ◽  
Density Wave ◽  
Two Dimensional ◽  
Structural Phase Transitions ◽  
Wave State ◽  
Charge Doping ◽  
Electromechanical Actuation

Charge doping could effectively modulate the charge density wave state of monolayer MoS2 with large strain output and superelasticity.

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