“…The trade-off between the magnetic anisotropy and soft-phase fraction has always been a formidable challenge for the fabrication of high-energy-product bulk nanocomposite magnets [14,24]. Strikingly, the remanence ratio of with a value of ∼0.72 in this study is far away from the shaded region [3,8,15-23,25-29] (as shown in Figure 4), indicating that a record-high magnetic anisotropy together with high soft-phase fraction has been obtained in bulk Pr 2 Fe 14 B/α-Fe nanocomposite magnet. Figure 3 Demagnetisation curves and the energy products ( BH in curves) parallel (//) and perpendicular (⊥) to pressure direction for the synthesised magnet. Figure 4 Representative magnetic anisotropy of bulk nanocomposite magnets with various soft-phase fractions.…”
Section: Resultsmentioning
confidence: 69%
“…The trade-off between the magnetic anisotropy and soft-phase fraction has always been a formidable challenge for the fabrication of highenergy-product bulk nanocomposite magnets [14,24]. Strikingly, the remanence ratio of (B r -B ⊥ r ) / B r with a value of ∼ 0.72 in this study is far away from the shaded region [3,8,[15][16][17][18][19][20][21][22][23][25][26][27][28][29] (as shown in Figure 4), indicating that a record-high magnetic anisotropy together with high soft-phase fraction has been obtained in bulk Pr 2 Fe 14 B/α-Fe nanocomposite magnet.…”
Section: Magnetic Propertiesmentioning
confidence: 68%
“… Figure 3 Demagnetisation curves and the energy products ( BH in curves) parallel (//) and perpendicular (⊥) to pressure direction for the synthesised magnet. Figure 4 Representative magnetic anisotropy of bulk nanocomposite magnets with various soft-phase fractions. For comparison, the magnetic anisotropy of single-phase R-Fe-B and SmCo 5 magnets[8,20,21,25,26], SmCo/α-Fe(Co) magnets[3,8,15,28], multiphase hybrid magnets[16,17,29] and R 2 Fe 14 B/α-Fe magnets[18,19,23,27] reported in previous literatures together with the data in this work are presented.…”
Section: Resultsmentioning
confidence: 99%
“…To quantify the degree of magnetic anisotropy, the remanence ratio of (B r -B ⊥ r ) / B r is generally employed. Numerous studies over the recent decades indicated that with increasing softphase fraction, the magnetic anisotropy and energy density of bulk nanocomposite magnets are greatly For comparison, the magnetic anisotropy of single-phase R-Fe-B and SmCo 5 magnets [8,20,21,25,26], SmCo/α-Fe(Co) magnets [3,8,15,28], multiphase hybrid magnets [16,17,29] and R 2 Fe 14 B/α-Fe magnets [18,19,23,27] reported in previous literatures together with the data in this work are presented. deteriorated [7,18,23].…”
Aligning the hard phase has always been a great challenge in fabricating bulk nanocomposite magnets due to the high soft-phase fractions. In this work, anisotropic bulk Pr2Fe14B/α-Fe nanocomposite magnets have been fabricated from amorphous precursors by high-pressure thermal compression deformation. The synthesised magnet exhibits an ultrastrong magnetic anisotropy with a high soft-phase fraction of ∼29 wt.% and a dual-morphology grain structure that consists of equiaxed and lath-shaped grains. The anisotropy is originated from the strong (00l) crystallographic texture for Pr2Fe14B nanocrystals on account of its preferential nucleation and growth during the deformation with high stress and large strain. This study is favourable for the development of bulk nanocomposite magnets with superior energy products on the premise of high soft-phase fractions.
“…The trade-off between the magnetic anisotropy and soft-phase fraction has always been a formidable challenge for the fabrication of high-energy-product bulk nanocomposite magnets [14,24]. Strikingly, the remanence ratio of with a value of ∼0.72 in this study is far away from the shaded region [3,8,15-23,25-29] (as shown in Figure 4), indicating that a record-high magnetic anisotropy together with high soft-phase fraction has been obtained in bulk Pr 2 Fe 14 B/α-Fe nanocomposite magnet. Figure 3 Demagnetisation curves and the energy products ( BH in curves) parallel (//) and perpendicular (⊥) to pressure direction for the synthesised magnet. Figure 4 Representative magnetic anisotropy of bulk nanocomposite magnets with various soft-phase fractions.…”
Section: Resultsmentioning
confidence: 69%
“…The trade-off between the magnetic anisotropy and soft-phase fraction has always been a formidable challenge for the fabrication of highenergy-product bulk nanocomposite magnets [14,24]. Strikingly, the remanence ratio of (B r -B ⊥ r ) / B r with a value of ∼ 0.72 in this study is far away from the shaded region [3,8,[15][16][17][18][19][20][21][22][23][25][26][27][28][29] (as shown in Figure 4), indicating that a record-high magnetic anisotropy together with high soft-phase fraction has been obtained in bulk Pr 2 Fe 14 B/α-Fe nanocomposite magnet.…”
Section: Magnetic Propertiesmentioning
confidence: 68%
“… Figure 3 Demagnetisation curves and the energy products ( BH in curves) parallel (//) and perpendicular (⊥) to pressure direction for the synthesised magnet. Figure 4 Representative magnetic anisotropy of bulk nanocomposite magnets with various soft-phase fractions. For comparison, the magnetic anisotropy of single-phase R-Fe-B and SmCo 5 magnets[8,20,21,25,26], SmCo/α-Fe(Co) magnets[3,8,15,28], multiphase hybrid magnets[16,17,29] and R 2 Fe 14 B/α-Fe magnets[18,19,23,27] reported in previous literatures together with the data in this work are presented.…”
Section: Resultsmentioning
confidence: 99%
“…To quantify the degree of magnetic anisotropy, the remanence ratio of (B r -B ⊥ r ) / B r is generally employed. Numerous studies over the recent decades indicated that with increasing softphase fraction, the magnetic anisotropy and energy density of bulk nanocomposite magnets are greatly For comparison, the magnetic anisotropy of single-phase R-Fe-B and SmCo 5 magnets [8,20,21,25,26], SmCo/α-Fe(Co) magnets [3,8,15,28], multiphase hybrid magnets [16,17,29] and R 2 Fe 14 B/α-Fe magnets [18,19,23,27] reported in previous literatures together with the data in this work are presented. deteriorated [7,18,23].…”
Aligning the hard phase has always been a great challenge in fabricating bulk nanocomposite magnets due to the high soft-phase fractions. In this work, anisotropic bulk Pr2Fe14B/α-Fe nanocomposite magnets have been fabricated from amorphous precursors by high-pressure thermal compression deformation. The synthesised magnet exhibits an ultrastrong magnetic anisotropy with a high soft-phase fraction of ∼29 wt.% and a dual-morphology grain structure that consists of equiaxed and lath-shaped grains. The anisotropy is originated from the strong (00l) crystallographic texture for Pr2Fe14B nanocrystals on account of its preferential nucleation and growth during the deformation with high stress and large strain. This study is favourable for the development of bulk nanocomposite magnets with superior energy products on the premise of high soft-phase fractions.
“…[46][47][48][49][50] However, the direct forming of Sm/Co alloys from metal salts by co-reduction is difficult since the standard electrode potential of Sm 3+ (E 0 = -2.301 eV) is far lower than that of Co 2+ (E 0 = -0.28 eV). [51,52] Surprisingly, mesoporous silica (mSiO 2 ) with diverse porous structure and high specific surface areas can be used to synthesize and immobilize metallic ions by entrapment, cross-linking, physical adsorption, and covalent binding techniques. [53] Specific nanometric size is required to generate fitted magnetic and catalysis properties, making it applicable for high-temperature solvent pyrolysis.…”
Current applications of multifunctional nanozymes for reprogramming the redox homeostasis of the tumor microenvironment (TME) have been severely confronted with low catalytic activity and the ambiguity of active sites of nanozymes, as well as the stress resistance from the rigorous physical environment of tumor cells. Herein, the Sm/Co‐doped mesoporous silica with 3PO‐loaded nanozymes (denoted as mSC‐3PO) are rationally constructed for simultaneously inhibiting energy production by adenosine triphosphate (ATP) inhibitor 3PO and reprogramming TME by multiactivities of nanozymes with photothermal effect assist, i.e., enhanced peroxidase‐like, catalase‐like activity, and glutathione peroxidase‐like activities, facilitating reactive oxygen species (ROS) generation, promoting oxygen content, and restraining the over‐expressed glutathione. Through the optimal regulation of nanometric size and doping ratio, the fabricated superparamagnetic mSC‐3PO enables the excellent exposure of active sites and avoids agglomeration owing to the large specific surface and mesoporous structure, thus providing adequate Sm/Co‐doped active sites and enough spatial distribution. The constructed Sm/Co centers both participate in the simulated biological enzyme reactions and carry out the double‐center catalytic process (Sm3+and Co3+/Co2+). Significantly, as the inhibitor of glycolysis, 3PO can reduce the ATP flow by cutting down the energy transform, thereby inhibiting tumor angiogenesis and assisting ROS to promote the early withering of tumor cells. In addition, the considerable near‐infrared (NIR) light absorption of mSC‐3PO can adapt to NIR excitable photothermal treatment therapy and photoexcitation‐promoted enzymatic reactions. Taken together, this work presents a typical therapeutic paradigm of multifunctional nanozymes that simultaneously reprograms TME and promotes tumor cell apoptosis with photothermal assistance.
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