scholarly journals Large Magnetovolume Effect Induced by Embedding Ferromagnetic Clusters into Antiferromagnetic Matrix of Cobaltite Perovskite

2018 ◽  
Vol 30 (2) ◽  
pp. 1705448
Author(s):  
Ping Miao ◽  
Xiaohuan Lin ◽  
Akihiro Koda ◽  
Sanghyun Lee ◽  
Yoshihisa Ishikawa ◽  
...  
Keyword(s):  
Magnetovolume Effect

scholarly journals Negative thermal expansion in YbMn2Ge2 induced by the dual effect of magnetism and valence transition

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Yongqiang Qiao ◽  
Yuzhu Song ◽  
Andrea Sanson ◽  
Longlong Fan ◽  
Qiang Sun ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Intermetallic Compound ◽  
Cell Volume ◽  
Valence State ◽  
Unit Cell Volume ◽  
Negative Thermal Expansion ◽  
Combined Effect ◽  
Dual Effect ◽  
Valence Transition ◽  
Magnetovolume Effect

AbstractNegative thermal expansion (NTE) is an intriguing property, which is generally triggered by a single NTE mechanism. In this work, an enhanced NTE (αv = −32.9 × 10−6 K−1, ΔT = 175 K) is achieved in YbMn2Ge2 intermetallic compound to be caused by a dual effect of magnetism and valence transition. In YbMn2Ge2, the Mn sublattice that forms the antiferromagnetic structure induces the magnetovolume effect, which contributes to the NTE below the Néel temperature (525 K). Concomitantly, the valence state of Yb increases from 2.40 to 2.82 in the temperature range of 300–700 K, which simultaneously causes the contraction of the unit cell volume due to smaller volume of Yb3+ than that of Yb2+. As a result, such combined effect gives rise to an enhanced NTE. The present study not only sheds light on the peculiar NTE mechanism of YbMn2Ge2, but also indicates the dual effect as a possible promising method to produce enhanced NTE materials.

The Magnetovolume Effect of an Amorphous Magnet Gd67Ni33

2003 ◽  
Vol 72 (5) ◽  
pp. 1184-1190 ◽  
Author(s):  
Ikuo Nakai ◽  
Hatsuo Tange ◽  
Kensuke Konishi ◽  
Tatsuo Kamimori ◽  
Akifumi Chikazawa ◽  
...  
Keyword(s):  
Magnetovolume Effect ◽  
Amorphous Magnet

Magnetovolume effect and magnetic properties ofDy2Fe17−xMnx

2007 ◽  
Vol 75 (17) ◽  
Author(s):  
J. L. Wang ◽  
S. J. Campbell ◽  
O. Tegus ◽  
C. Marquina ◽  
M. R. Ibarra
Keyword(s):  
Magnetic Properties ◽  
Magnetovolume Effect

Structural and Magnetocaloric Properties of Ball Milled LaFe13−xSix(H,C)y

MRS Advances ◽  
2017 ◽  
Vol 2 (56) ◽  
pp. 3447-3452
Author(s):  
L. Bessais ◽  
M. Phejar ◽  
V. Paul-Boncour
Keyword(s):  
Curie Temperature ◽  
Magnetic Moments ◽  
Synthesis Method ◽  
Annealing Treatment ◽  
Interstitial Site ◽  
High Energy ◽  
Magnetocaloric Properties ◽  
Magnetovolume Effect ◽  
Short Annealing ◽  
Giant Magnetocaloric Effect

ABSTRACTLaFe13−xSix compounds display a giant magnetocaloric effect near 200 K. The insertion of light elements (H, C) is used to improve the Curie temperature near ambient temperature for magnetic refrigeration applications. We have developed a synthesis method with a short annealing treatment compared to classical melting techniques. The parent intermetallic alloys were synthesized by high energy ball milling. The insertion of H atoms was carried out using a Sievert apparatus and the carbon atom was inserted by solid/solid reaction. Moreover, structural and magnetic results were carried out by neutron diffraction and Mössbauer spectrometry for H content (y = 0.7,1.5) and C content (y = 0.7). The cell parameter and the Fe magnetic moments versus temperature are determined. The misunderstanding on interstitial site is clarified. The magnetovolume effect on the Curie temperature is explained by combination of the structural and magnetic properties. The advantages and drawbacks of each type of element insertion are discussed.

Magnetovolume effect of Co2B

1997 ◽  
Vol 259 (1-2) ◽  
pp. L1-L4 ◽  
Author(s):  
T. Kanomata ◽  
Y. Ise ◽  
N. Kumagai ◽  
A. Haga ◽  
K. Kamishima ◽  
...  
Keyword(s):  
Magnetovolume Effect

Magnetovolume effect in the paramagnetic phase of Sm1−xSrxMnO3 (x=0.45,0.33) compounds

2001 ◽  
Vol 226-230 ◽  
pp. 999-1001 ◽  
Author(s):  
C Marquina ◽  
M.R Ibarra ◽  
A.I Abramovich ◽  
A.V Michurin ◽  
L.I Koroleva
Keyword(s):  
Paramagnetic Phase ◽  
Magnetovolume Effect
Sign in / Sign up

Export Citation Format

Share Document