Large magnetic-field-induced strains in sintered chromium tellurides

Kubota, Yuki; Kanematsu, Tomoya; Yajima, Takeshi; Hirai, Daigorou; Takenaka, K.

doi:10.1063/5.0134911

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…Similarly, the out-of-plane (a-axis) AFM transition gradually dissipates with increasing applied field and completely disappears at H = 5000 Oe. In support of the magneto-volume effect in these systems [34,35], we could clearly find a change in magnetization M(T) (FC data) at around T t =180 K where we also observe a noticeable change in the lattice constants…”

Section: Magnetic Propertiessupporting

confidence: 74%

“…Specifically, down to 100 K, both b and c monotonically increase with decreasing temperature. But below 100 K, b and c decrease with decreasing temperature to have a minimum at 50 K and again increase with decreasing temperature to peak out at 35 K. Worth to mention here that at around 180 ± 20 K we find a noticeable change in the lattice constants a, b and c. Such an unusual lattice constants behavior with temperature plausibly due to the magneto-volume effect in these type of systems Cr 1+x Te 2 [34,35].…”

Section: Experimental and Computational Methodsmentioning

confidence: 54%

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Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂

Purwar,

Bhowmik,

Rajesh

et al. 2024

Phys. Scr.

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We investigate the structural, magnetocrystalline anisotropy, critical behaviour, and magnetocaloric effect in the layered room-temperature monoclinic ferromagnet Cr$_{1.38}$Te$_2$. The critical behavior is studied by employing various techniques such as the modified Arrott plot (MAP), the Kouvel-Fisher method (KF), and the critical isothermal analysis (CI) around the Curie temperature ($T_C$) of 316 K. The derived critical exponents are self-consistent and obey the rescaling analysis. The Monte-Carlo simulations reproduce the experimentally obtained critical exponents. However, the derived critical exponents do not suggest any single universality class of the magnetic interactions. On the other hand, the renormalization group (RG) theory suggests 3D-Ising type long-range exchange interactions [$J(r)$], decaying with distance ($r$) as $J (r) = r^{-(d+\sigma)}= r^{-4.73}$. Further, magnetocrystalline anisotropy energy density (K$_u$) is found to be temperature dependent. The ground state magnetic easy-axis ($b$-axis) is identified by analyzing the magnetocrystalline anisotropy energy (MAE) using the density functional theory calculations. Maximum entropy change -$\Delta S_{m}^{max}$$\approx$2.51 J/kg-K is found near the $T_C$.

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Section: Magnetic Propertiessupporting

confidence: 74%

Section: Experimental and Computational Methodsmentioning

confidence: 54%

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂

Purwar,

Bhowmik,

Rajesh

et al. 2024

Phys. Scr.

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Electroactive actuator composites using volume change induced by insulator-to-metal transition in VO2

Takenaka,

Mizuno,

Shibutani

et al. 2023

Applied Physics Letters

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This report describes the actuator functionality of a ceramic composite that uses the volume change caused by the insulator–metal (I–M) transition of VO2. When an electrical field was applied at 295 K, 50 vol. %-VO2/Al2O3 ceramic composite underwent the I–M transition because the VO2 powder dispersed in the composite became metallic. Simultaneous measurement of I–V characteristics and linear strain demonstrated that this I–M transition was accompanied by a positive strain. This strain increased with increase in the limit current value, which limits excessive current flow after transition. The strain exceeded 1300 ppm at maximum. Its magnitude corresponded to the volume change obtained from thermal expansion measurements on the composite. This composite performs a volume-change-driven actuator function that is distinct from the strain-driven counterpart of piezoelectric materials.

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Electric field-induced volume change in pyro-vanadate-phosphates: Toward an alternative actuator architecture

Takada,

Shibutani,

Yagi

et al. 2024

Applied Physics Letters

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We discovered large electric-field-induced strain in pyro-vanadate-phosphate Cu2−xZnxV1.8P0.2O7. Distinct from conventionally used piezoelectric materials including lead-zirconate-titanate, this material expands almost isotropically at room temperature when an electric field is applied. This volume change, exceeding 1000 ppm under the field of E = 3900 V/cm, is of the largest class induced by an electric field. The strain is phenomenologically interpreted as electrostriction because it is symmetric about E = 0 and because it obeys a higher term than E-linear such as E squared. The present x-ray diffraction experiments suggest that the applied electric field distorts the crystal lattice, although there is no structural phase transition. This material performs a volume-change-driven actuator function that is distinct from the strain-driven counterpart of piezoelectric materials. The discovery of actuator functionality in a material system with a non-perovskite structure, unlike the actuator materials developed to date, is a major breakthrough for future actuator engineering.

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Large magnetic-field-induced strains in sintered chromium tellurides

Cited by 7 publications

References 28 publications

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂

Electroactive actuator composites using volume change induced by insulator-to-metal transition in VO2

Electric field-induced volume change in pyro-vanadate-phosphates: Toward an alternative actuator architecture

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Large magnetic-field-induced strains in sintered chromium tellurides

Cited by 7 publications

References 28 publications

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr1.38Te2

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr1.38Te2

Electroactive actuator composites using volume change induced by insulator-to-metal transition in VO2

Electric field-induced volume change in pyro-vanadate-phosphates: Toward an alternative actuator architecture

Contact Info

Product

Resources

About

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂

Experimental and computational Insights Into the magnetic anisotropy and magnetic behaviour of layered room-temperature ferromagnet Cr_1.38Te₂