"sphere of power" is a correct and usable phrase in written English.
It refers to a particular area or domain in which someone or something has influence or control. You can use it in various contexts, such as politics, business, and personal relationships. Example: The new CEO's sphere of power includes overseeing all company operations and making major decisions that will shape the company's future.
The deal reflected growing alarm in a range of countries that had been part of the Soviet sphere about a newly rich and powerful Russia's intentions in its former cold war sphere of power.
But the deal reflected growing alarm in countries like Poland, once a conquered Soviet client state, about a newly rich and powerful Russia's intentions in its former cold war sphere of power.
For Poland, meanwhile, the goal has been to anchor an American military presence in the country at a time of growing concern in former Communist countries about a newly rich and powerful Russia's intentions in its former cold war sphere of power.
The changes Mr. Hevesi proposed -- which would not affect the current election -- are not within a mayor's sphere of power, but would require action by the State Legislature.
The fundamental religious boundary is that between the sacred and the profane, the sacred being conceived of as a sphere of power superior to or opposed to the mundane.
Earlier, Iran's supreme leader Ayatollah Ali Khamenei condemned the prospect of US intervention in Iraq, saying Washington's main intention was to keep Iraq within its own sphere of power.
If few black men enter higher education, they will continue to be rare in corporate boardrooms and other spheres of power.
According to Israeli Vice Premier Shimon Peres, Israel hopes to isolate and contain the Shia/Farsi spheres of power by forging open cooperation with the Sunni/Arab domain.
Increasingly, conservative forces opposed to democratic reform who enjoy the financial backing of well-placed power brokers have been willing to use any means, including violence, to maintain a hold on various spheres of power.
"Mubarak has no single confidant or adviser who can truly speak for him," Scobey said, "and he has prevented any of his main advisers from operating outside their strictly circumscribed spheres of power.
Elites are self-perpetuating; the different spheres of power interplaying with one another, meaning the economic elite can more easily dabble in politics – think of the Mitford sisters trying ideologies on like dresses.
